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Contents
- 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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in Ottawa, Ohio, with an average temperature fluctuating between 31.1°F (-0.5°C) and 19.8°F (-6.8°C). In Ottawa, January records the lowest average temperatures, peaking at 31.1°F (-0.5°C) and reaching a low of 19.8°F (-6.8°C). Weather in January »
Weather in February
February, the last month of the winter in Ottawa, is a wintry month, with an average temperature ranging between min 22.8°F (-5.1°C) and max 34.7°F (1.5°C). The commencement of February notes an average high-temperature of a wintry 34.7°F (1.5°C), exhibiting little difference from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Ottawa, Ohio, with an average temperature ranging between max 46.2°F (7.9°C) and min 31.8°F (-0.1°C). Observing a rise in March, the average high-temperature goes from February's cold 34.7°F (1.5°C) to a chilly 46.2°F (7.9°C). Weather in March »
Weather in April
April in Ottawa, Ohio, is a refreshing spring month, with an average temperature ranging between max 58.6°F (14.8°C) and min 41.7°F (5.4°C). Ottawa experiences a temperature shift with the start of April, with average high-temperatures moving from a chilly 46.2°F (7.9°C) in March to a mild 58.6°F (14.8°C). Weather in April »
Weather in May
May, the last month of the spring in Ottawa, is a pleasant month, with temperature in the range of an average low of 53.6°F (12°C) and an average high of 70.3°F (21.3°C). With the transition into May, Ottawa experiences an increase in average high-temperatures, moving up from a refreshing 58.6°F (14.8°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Ottawa, Ohio, with temperature in the range of an average low of 61°F (16.1°C) and an average high of 77.9°F (25.5°C). June's arrival signals a modest temperature shift, moving from an agreeable 70.3°F (21.3°C) in May to a warm 77.9°F (25.5°C). Weather in June »
Weather in July
July, like June, in Ottawa, Ohio, is a moderately hot summer month, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 81.1°F (27.3°C). Ottawa's July weather reaches an average high of 81.1°F (27.3°C) and an average low of 64°F (17.8°C), making it the warmest month. For July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Ottawa, is also a moderately hot month, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 61.2°F (16.2°C). The transition from July to August sees an average high-temperature of a still moderately hot 79.2°F (26.2°C), indicating a minor variance from the prior month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Ottawa, Ohio, with temperature in the range of an average high of 74.1°F (23.4°C) and an average low of 55.6°F (13.1°C). During September, Ottawa records an average high-temperature of a still moderately hot 74.1°F (23.4°C), marking a slight divergence from August's 79.2°F (26.2°C). Weather in September »
Weather in October
October, like September, in Ottawa, Ohio, is another enjoyable autumn month, with an average temperature fluctuating between 46.2°F (7.9°C) and 61.9°F (16.6°C). The onset of October comes with a shift in the average high-temperature, falling from a moderately hot 74.1°F (23.4°C) in September to a refreshing 61.9°F (16.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Ottawa, Ohio, with an average temperature ranging between min 35.1°F (1.7°C) and max 47.8°F (8.8°C). In the transition to November, Ottawa observes a drop in the average high-temperature, moving from a refreshing 61.9°F (16.6°C) in October to a chilly 47.8°F (8.8°C). Weather in November »
Weather in December
December, the first month of the winter in Ottawa, is also an icy month, with temperature in the range of an average low of 27.3°F (-2.6°C) and an average high of 36.9°F (2.7°C). Ottawa in December demonstrates a small temperature transition, adjusting from an average high of a chilly 47.8°F (8.8°C) in November to a wintry 36.9°F (2.7°C). Weather in December »
Updated: Jul 10, 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 are the coldest months?
With average temperatures fluctuating between a high of 31.1°F (-0.5°C) and a low of 19.8°F (-6.8°C), January stands out as the coldest month.
How much does it rain?
In Ottawa, during the entire year, the rain falls for 161 days and collects up to 27.24" (692mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
Throughout the year, there are 50.5 snowfall days, and 13.66" (347mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.3h of sunshine, January has the least sunshine of the year.
What is the most humid month?
The most humid month is February, with an average relative humidity of 84%.
What is the driest month in Ottawa?
The month with the least rainfall is February, when the rain falls for 8 days and typically collects 1.65" (42mm) of precipitation.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 12.3 days and accumulates 4.06" (103mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Ottawa, 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 18.3 days and accumulates 3.15" (80mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
When is the highest UV index?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What part of the year is the hottest?
Ottawa's warmest temperatures are experienced in July, with average high temperatures of 81.1°F (27.3°C) and lows of 64°F (17.8°C).
What month has the most sunshine?
With an average of 9.9h of sunshine, July has the most sunshine of the year.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
What is the month with the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Ottawa, OH
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.1°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Ottawa, OH
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Ottawa, OH
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.5mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Ottawa, OH
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Ottawa, OH
- Average rainfall in January:
1.85" - Average rainfall in February:
1.65" - Average rainfall in March:
2.2" - Average rainfall in April:
3.07" - Average rainfall in May:
3.15" - Average rainfall in June:
3.07"
- Average rainfall in July:
2.6" - Average rainfall in August:
2.28" - Average rainfall in September:
1.81" - Average rainfall in October:
1.97" - Average rainfall in November:
1.89" - Average rainfall in December:
1.69"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days
Ottawa, OH
- Average rainfall days in January:
7.1 days - Average rainfall days in February:
8 days - Average rainfall days in March:
12 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
15 days - Average rainfall days in September:
13.7 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
10.1 days - Average rainfall days in December:
11.2 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (7.1 days).
Average snowfall
Ottawa, OH
- Average snowfall in January:
3.31" - Average snowfall in February:
4.06" - Average snowfall in March:
1.54" - Average snowfall in April:
0.79" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Ottawa, OH
- Average snowfall days in January:
14.3 days - Average snowfall days in February:
12.3 days - Average snowfall days in March:
6.4 days - Average snowfall days in April:
1.7 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:
4.1 days - Average snowfall days in December:
11.3 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Ottawa, OH
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 2min - Average sunshine in February:
4h and 1min - Average sunshine in March:
5h and 4min - Average sunshine in April:
6h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
7h and 4min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days
Ottawa, OH
- Average sunshine days in January:
10.3 days - Average sunshine days in February:
9.3 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
11.6 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
16.2 days - Average sunshine days in December:
11.6 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is February (9.3 days).
Average UV index
Ottawa, OH
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Ottawa, OH
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility
Ottawa, OH
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Ottawa, Ohio, USA
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