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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, in Roslyn, Pennsylvania, is an icy winter month, with temperature in the range of an average high of 36.7°F (2.6°C) and an average low of 24.6°F (-4.1°C). In Roslyn, the lowest average temperatures are observed in January, with a high of 36.7°F (2.6°C) and a low of 24.6°F (-4.1°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Roslyn, Pennsylvania, with an average temperature fluctuating between 26.6°F (-3°C) and 40.5°F (4.7°C). February's advent presents an average high-temperature of a still wintry 40.5°F (4.7°C), indicating a slight variation from the conditions of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Roslyn, is a chilly month, with an average temperature varying between 33.8°F (1°C) and 48.7°F (9.3°C). March's onset brings a minor rise in the average high-temperature, moving from a wintry 40.5°F (4.7°C) in February to a frosty 48.7°F (9.3°C). Weather in March »
Weather in April
April in Roslyn, Pennsylvania, is a comfortable spring month, with an average temperature fluctuating between 44.1°F (6.7°C) and 61.2°F (16.2°C). Observing a rise in April, the average high-temperature goes from March's chilly 48.7°F (9.3°C) to an enjoyable 61.2°F (16.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Roslyn, Pennsylvania, with an average temperature varying between 71.8°F (22.1°C) and 54.1°F (12.3°C). The shift into May is marked by a rise in the average high-temperature, moving from April's enjoyable 61.2°F (16.2°C) to an agreeable 71.8°F (22.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Roslyn, Pennsylvania, with temperature in the range of an average low of 62.1°F (16.7°C) and an average high of 79.9°F (26.6°C). June's onset brings a minor rise in the average high-temperature, moving from a pleasant 71.8°F (22.1°C) in May to a warm 79.9°F (26.6°C). Weather in June »
Weather in July
July is a tropical summer month in Roslyn, Pennsylvania, with an average temperature fluctuating between 68.2°F (20.1°C) and 86.2°F (30.1°C). July registers as the month with the highest average temperatures, reaching 86.2°F (30.1°C) at its peak and 68.2°F (20.1°C) at the lowest. The heat index value for July is appraised at a torrid 96.8°F (36°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Roslyn, Pennsylvania, with an average temperature fluctuating between 83.3°F (28.5°C) and 66.7°F (19.3°C). August records an average high-temperature of a moderately hot 83.3°F (28.5°C), indicating a minor variation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Roslyn, Pennsylvania, with an average temperature ranging between min 59.9°F (15.5°C) and max 76.1°F (24.5°C). As September commences, the average high-temperature subtly reduces, transitioning from a warm 83.3°F (28.5°C) in August to a still moderately hot 76.1°F (24.5°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Roslyn, Pennsylvania, with an average temperature ranging between max 64°F (17.8°C) and min 49.5°F (9.7°C). As Roslyn enters October, the average high-temperature decreases from the a warm 76.1°F (24.5°C) of September to a refreshing 64°F (17.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Roslyn, is also a fresh month, with an average temperature varying between 52.2°F (11.2°C) and 37.9°F (3.3°C). With the onset of November, Roslyn experiences a modest temperature adjustment, with the average high-temperature receding from an enjoyable 64°F (17.8°C) in October to a fresh 52.2°F (11.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Roslyn, Pennsylvania, with an average temperature ranging between max 42.8°F (6°C) and min 31.6°F (-0.2°C). Transition into December marks a drop in the average high-temperature, moving from a cool 52.2°F (11.2°C) in November to a frosty 42.8°F (6°C). Weather in December »
Updated: Aug 25, 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 month is the coldest?
January, characterized by an average high temperature of 36.7°F (2.6°C) and a low temperature of 24.6°F (-4.1°C), is generally the coldest month.
How many days does it rain?
Throughout the year, there are 122.4 rainfall days, and 12.68" (322mm) of precipitation is accumulated.
When does it snow?
Months with snowfall in Roslyn are January through April, November and December.
How much does it snow?
In Roslyn, during the entire year, snow falls for 16.3 days and aggregates up to 4.72" (120mm) of snow.
When is the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What are the most humid months?
The months with the highest humidity are February, October and December, with an average relative humidity of 78%.
When does it snow the most?
The month with the most snowfall in Roslyn is February, when snow falls for 4.8 days and typically aggregates up to 1.46" (37mm) of snow.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.8h of sunshine.
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 least humid month in Roslyn?
April, July and August, with an average relative humidity of 72%, are the least humid months.
When it does not snow?
In Roslyn, snow does not fall in May through October.
When is the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What is the warmest month?
Roslyn's warmest month, July, registers temperatures that range from a high of 86.2°F (30.1°C) to a low of 68.2°F (20.1°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.7h of sunshine.
What is the rainiest month?
August is the month with the most rainfall. Rain falls for 12.7 days and accumulates 1.54" (39mm) of precipitation.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10.1 days and typically collects 0.75" (19mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Roslyn, PA
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Roslyn, PA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Roslyn, PA
- Average wind speed in January:
8mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.4mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.2mph - Average wind speed in December:
7.6mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity
Roslyn, PA
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall
Roslyn, PA
- Average rainfall in January:
0.83" - Average rainfall in February:
0.83" - Average rainfall in March:
1.02" - Average rainfall in April:
0.98" - Average rainfall in May:
1.18" - Average rainfall in June:
1.22"
- Average rainfall in July:
1.42" - Average rainfall in August:
1.54" - Average rainfall in September:
0.75" - Average rainfall in October:
0.91" - Average rainfall in November:
0.87" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days
Roslyn, PA
- Average rainfall days in January:
6.6 days - Average rainfall days in February:
7 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
14.1 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
13.9 days - Average rainfall days in August:
12.7 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).
Average snowfall
Roslyn, PA
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Roslyn, PA
- Average snowfall days in January:
5.1 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Roslyn, PA
- 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Roslyn, PA
- Average sunshine days in January:
21.1 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
15.4 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
14.7 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
21.3 days - Average sunshine days in December:
20.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).
Average UV index
Roslyn, PA
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Roslyn, PA
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Roslyn, PA
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Roslyn, Pennsylvania, USA
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