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Contents
- The climate of Oswego
- The best time to visit Oswego
- The worst time to visit Oswego
- Spring weather in Oswego
- Summer weather in Oswego
- Autumn weather in Oswego
- Winter weather in Oswego
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers
The climate of Oswego
Oswego, New York, USA is characterized by a humid continental climate, classified as Dfb in the Köppen climate classification system. This typology refers to no dry season and relatively warm summers. This lake-side city's climate mirrors a regular ebb and flow of weather conditions throughout the four distinct seasons.
Over the year, temperatures fluctuate from a low average of 21.7°F (-5.7°C) in January to a high of 74.1°F (23.4°C) in August. Humidity levels are consistently high, with monthly averages ranging from 75% to 83%, but there is no significant variation from month to month. Rainfall proportionately spreads throughout the year, with slight peaks in May at 4.37" (111mm) and in October at 3.74" (95mm).
The city experiences an ample amount of snowfall, specifically from 2.95" (75mm) in January to 0.04" (1mm) in October, indicating a predominance of snowy weather in winter. On the contrary, the amount of sunshine Oswego witnesses changes drastically: it boasts nearly 10.5 hours a day in July, but only 2.3 hours in January. These annual varied weather conditions concretize the distinctive attributes of Oswego's climate.
Over the year, temperatures fluctuate from a low average of 21.7°F (-5.7°C) in January to a high of 74.1°F (23.4°C) in August. Humidity levels are consistently high, with monthly averages ranging from 75% to 83%, but there is no significant variation from month to month. Rainfall proportionately spreads throughout the year, with slight peaks in May at 4.37" (111mm) and in October at 3.74" (95mm).
The city experiences an ample amount of snowfall, specifically from 2.95" (75mm) in January to 0.04" (1mm) in October, indicating a predominance of snowy weather in winter. On the contrary, the amount of sunshine Oswego witnesses changes drastically: it boasts nearly 10.5 hours a day in July, but only 2.3 hours in January. These annual varied weather conditions concretize the distinctive attributes of Oswego's climate.
The best time to visit Oswego
When considering the best time to soak up Oswego's diverse attractions, it largely hinges on personal preferences. Nevertheless, the span from late spring to early fall appears to provide the most appealing weather. Specifically, June through September tend to offer a balanced blend of warm temperatures, from 65.1°F (18.4°C) to 74.1°F (23.4°C), relatively low rainfall, from 3.66" (93mm) to 4.13" (105mm), and extended periods of daily sunshine, from 9.3 hours to 10.5 hours, to make outdoor activities enjoyable.
The worst time to visit Oswego
While winter has its own charm, the traditional tourism season largely avoids the coldest months. From December to February, average high temperatures do not exceed 37.2°F (2.9°C), and the mercury often dips to lows around 21.7°F (-5.7°C). Moreover, these months also account for notable snowfall, peaking at 3.94" (100mm) in February, which could somewhat delay or disrupt travel plans.
Spring weather in Oswego
Spring in Oswego unfolds slowly, with increasing temperatures gradually melting away the winter snow. March sees the temperature rise from an average low of 28.8°F (-1.8°C) to a high of 37.2°F (2.9°C), while April and May continue this warming trend, with highs of 47.1°F (8.4°C) and 56.8°F (13.8°C), respectively. The blossoming spring also ushers in higher rainfall from 2.28" (58mm) in March to 4.37" (111mm) in May. Nonetheless, the lengthening daylight and the burgeoning greenery make it an enjoyable season overall.
Summer weather in Oswego
Oswego comes alive under the benign summer sun, with the season lasting from June through August. Average high temperatures reach a comfortable 73.8°F (23.2°C) in July and 74.1°F (23.4°C) in August, showcasing the warmest period of the year. Rainfall takes a marginal dip, hovering between 3.66" (93mm) and 4.13" (105mm). Additionally, Oswego illicits daily sunshine surpassing 9 hours, culminating to 10.5 hours in July, which allows plenty of time to partake in outdoor activities.
Autumn weather in Oswego
The autumn months bring a crisp change to Oswego's climate, as temperatures descend swiftly from an average high of 68.9°F (20.5°C) in September to 45.9°F (7.7°C) in November. A little increase in rainfall occurs in October, reaching 3.74" (95mm), but the amount of daily sunshine decreases progressively from 9.3 hours in September to 4.1 hours in November. Despite these alterations, the riot of fall colors blanketing the city offers a visually splendid experience.
Winter weather in Oswego
Winter sets in firmly in December and lasts until February, highlighted by falling temperatures, limited sunshine and an influx of snowfall. The average high temperatures waver between 29.8°F (-1.2°C) and 37.2°F (2.9°C) while the lows can plunge to around 21.7°F (-5.7°C). Snowfall in winter months is significant, stretching up to 3.94" (100mm) in February. Daily sunshine minimizes down to 2.7 hours in December, marking the bleakest time. Yet, the city’s winter charm lies in its snow-laden landscapes and ice-covered Lake Ontario.
Weather in January
The beginning of a new year in Oswego, New York, greets residents with typical winter conditions, as cold temperatures dominate the month's weather patterns. The city experiences its second highest snowfall in January, making it a winter wonderland. Weather in January »
Weather in February
February continues Oswego's streak of winter weather, partially carrying over the cold and snow from January, but shifting towards gradual weather improvements. This month is distinctively marked by its highest average snowfall of 3.94" (100mm). Weather in February »
Weather in March
March ushers in a transition phase in Oswego's climate, bridging the gap between the receding winter and the approaching spring. While March still sees wintry conditions with the third highest snowfall, it starts to introduce warmer temperatures and longer daylight hours. Weather in March »
Weather in April
April witnesses a complete shift in Oswego's weather conditions, with spring now fully taking over the reins from winter. There's a noteworthy decline in snowfall from previous months to an average of 0.47" (12mm) in April. With daylight high at 13.5 hours, the city begins to bask in spring's glow. Weather in April »
Weather in May
May continues the warming trend in Oswego, providing a pleasant prelude to the summer. The month is devoid of any snowfall while temperatures continue to rise steadily, and it starts to rain more frequently. Peak temperatures average around 56.8°F (13.8°C), a sure sign that summer is just around the corner. Weather in May »
Weather in June
June marks the start of summer in Oswego, and accordingly, the weather rises to seasonal highs. Temperatures spike up, yet the humidity level remains quite stable, creating comfortable conditions for inhabitants. Sunshine clocks in at an impressive average of 9.5 hours per day in June. Weather in June »
Weather in July
July is Oswego's warmest month with an average high temperature soaring to 73.8°F (23.2°C). Surrounding this peak are various weather shifts — Oswego basks in the most sunshine during this month, and high sea temperatures lure residents towards water-related activities. Weather in July »
Weather in August
August remains hot in Oswego, still holding on to the summer splendor instigated by July. Temperatures continue to be high, sometimes even surpassing July with an average peak of 74.1°F (23.4°C). Despite being one of the warmer months, August brings with it more rain, sustaining a moderate and well-balanced environment. Weather in August »
Weather in September
September’s arrival in Oswego ushers in the inevitable transition from summer to fall, with temperatures starting to dip noticeably. Despite seeing temperatures decline, the city records an average high of 68.9°F (20.5°C) - a remnant of the recent summer. Weather in September »
Weather in October
In October, Oswego begins to embrace the crispness of fall as temperatures and daylight hours continue to drop. Mild temperatures feature across the city, creating pleasant conditions that underline the essence of fall. A unique occurrence in October is the first trace of snowfall since April, a precursor to the upcoming winter chill. Weather in October »
Weather in November
By November, Oswego is heading firmly into winter, with temperatures falling consistently. Snowfall further increases, gathering pace for December and January. With an average high temperature of 45.9°F (7.7°C) and a chilly sea temperature of 49.7°F (9.8°C), November significantly contrasts from the warmer months. Weather in November »
Weather in December
December in Oswego is a winner's paradise as the city officially enters the winter season. One of the coldest months, December records a substantial increase in snowfall. This is accentuated by average temperatures dropping sharply to a high of 36.5°F (2.5°C) and a low of 29.5°F (-1.4°C). Weather in December »
Updated: Jun 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
In Oswego, January is the coldest month, with temperatures averaging a high of 29.8°F (-1.2°C) and a low of 21.7°F (-5.7°C).
What is the driest month?
January is the month with the least rainfall. Rain falls for 6.1 days and accumulates 2.2" (56mm) of precipitation.
How much does it rain?
In Oswego, during the entire year, the rain falls for 163 days and collects up to 37.83" (961mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
How much does it snow?
Throughout the year, there are 46.3 snowfall days, and 14.8" (376mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 2.3h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 11.8 days and typically aggregates up to 3.94" (100mm) of snow.
What month is the ocean coldest?
With an average ocean temperature of 35.4°F (1.9°C), March is the month with the coldest seawater.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the rainiest month?
May is the month with the most rainfall. Rain falls for 16.6 days and accumulates 4.37" (111mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
What is the most humid month in Oswego?
With an average relative humidity of 83%, June is the most humid month in Oswego.
When are the longest days?
With an average of 15h and 24min of daylight, June has the longest days of the year in Oswego.
What month has the most sunshine?
With an average of 10.5h of sunshine, July has the most sunshine of the year.
When is the highest UV index?
July is the month with the highest UV index, with an average maximum UV index of 6.
What part of the year is the hottest?
August proves to be the warmest month, recording an average peak temperature of 74.1°F (23.4°C) and a minimum temperature of 65.8°F (18.8°C).
When is the ocean warmest?
The month with the warmest seawater is August, with an average ocean temperature of 73.2°F (22.9°C).
What are the least humid months?
September and November, with an average relative humidity of 75%, are the least humid months.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Oswego, NY
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is January (29.8°F).
The months with the highest average low temperature are July and August (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure
Oswego, NY
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.03"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Oswego, NY
- Average wind speed in January:
15mph - Average wind speed in February:
14.5mph - Average wind speed in March:
13mph - Average wind speed in April:
12.7mph - Average wind speed in May:
9.6mph - Average wind speed in June:
9mph
- Average wind speed in July:
8.5mph - Average wind speed in August:
9.3mph - Average wind speed in September:
10.4mph - Average wind speed in October:
12.9mph - Average wind speed in November:
14.2mph - Average wind speed in December:
14.7mph
The windiest month (with the highest average wind speed) is January (15mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity
Oswego, NY
The month with the highest relative humidity is June (83%).
The months with the lowest relative humidity are September and November (75%).
Average rainfall
Oswego, NY
- Average rainfall in January:
2.2" - Average rainfall in February:
2.28" - Average rainfall in March:
2.28" - Average rainfall in April:
3.19" - Average rainfall in May:
4.37" - Average rainfall in June:
4.13"
- Average rainfall in July:
3.66" - Average rainfall in August:
3.82" - Average rainfall in September:
2.72" - Average rainfall in October:
3.74" - Average rainfall in November:
2.48" - Average rainfall in December:
2.95"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days
Oswego, NY
- Average rainfall days in January:
6.1 days - Average rainfall days in February:
6 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
18.2 days - Average rainfall days in August:
18.6 days - Average rainfall days in September:
14.8 days - Average rainfall days in October:
18.1 days - Average rainfall days in November:
11.6 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (6 days).
Average snowfall
Oswego, NY
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Oswego, NY
- Average snowfall days in January:
11.1 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
2.5 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
9.3 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Oswego, NY
The best month for swimming (with the highest average sea temperature) is August (73.2°F).
The coldest month (with the lowest average sea temperature) is March (35.4°F).
Average daylight / Average sunshine
Oswego, NY
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
2h and 2min - Average sunshine in February:
2h and 2min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 2min - Average sunshine in October:
4h and 4min - Average sunshine in November:
4h and 1min - Average sunshine in December:
2h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days
Oswego, NY
- Average sunshine days in January:
10.7 days - Average sunshine days in February:
8.9 days - Average sunshine days in March:
12.9 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
13.1 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
10.2 days - Average sunshine days in September:
13.7 days - Average sunshine days in October:
11.2 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
8.5 days
The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is December (8.5 days).
Average UV index
Oswego, NY
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Oswego, NY
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility
Oswego, NY
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Oswego, New York, USA
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