Expand
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 Grassflat, Pennsylvania, with an average temperature fluctuating between 18°F (-7.8°C) and 30.6°F (-0.8°C). During the coldest month, January, temperatures average a high of 30.6°F (-0.8°C) and a low of 18°F (-7.8°C). Weather in January »
Weather in February
February, the last month of the winter in Grassflat, is a wintry month, with temperature in the range of an average low of 20.3°F (-6.5°C) and an average high of 34.5°F (1.4°C). The advent of February reveals an average high-temperature of a wintry 34.5°F (1.4°C), showing minimal difference from the prior month. Weather in February »
Weather in March
March, the first month of the spring in Grassflat, is a frosty month, with an average temperature varying between 44.1°F (6.7°C) and 28°F (-2.2°C). March marks a rise in the average high-temperature, moving from February's wintry 34.5°F (1.4°C) to a chilly 44.1°F (6.7°C). Weather in March »
Weather in April
April is a moderate spring month in Grassflat, Pennsylvania, with an average temperature fluctuating between 37.9°F (3.3°C) and 56.5°F (13.6°C). April's arrival is marked by an increase in the average high-temperature, moving from a chilly 44.1°F (6.7°C) in March to a moderate 56.5°F (13.6°C). Weather in April »
Weather in May
May, the last month of the spring in Grassflat, is an agreeable month, with an average temperature ranging between min 48°F (8.9°C) and max 68.5°F (20.3°C). In May, the average high-temperature increases from a refreshing 56.5°F (13.6°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Grassflat, Pennsylvania, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 54.5°F (12.5°C). June's arrival coincides with a marginal rise in the average high-temperature, moving from May's pleasant 68.5°F (20.3°C) to a warm 76.3°F (24.6°C). Weather in June »
Weather in July
July, like June, in Grassflat, Pennsylvania, is a moderately hot summer month, with an average temperature fluctuating between 59.2°F (15.1°C) and 81.3°F (27.4°C). Grassflat's warmest month, July, registers temperatures that range from a high of 81.3°F (27.4°C) to a low of 59.2°F (15.1°C). In July, the average heat index is estimated at a hot 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Grassflat, is another warm month, with an average temperature fluctuating between 79.3°F (26.3°C) and 56.8°F (13.8°C). August welcomes an average high-temperature of a still moderately hot 79.3°F (26.3°C), not much different from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Grassflat, Pennsylvania, with an average temperature varying between 52°F (11.1°C) and 72.3°F (22.4°C). September's arrival aligns with a minor decrease in average high-temperatures, from August's warm 79.3°F (26.3°C) to an agreeable 72.3°F (22.4°C). Weather in September »
Weather in October
October, the same as September, in Grassflat, Pennsylvania, is another mild autumn month, with an average temperature fluctuating between 42.6°F (5.9°C) and 59°F (15°C). October involves a decrease in temperature, down from an agreeable 72.3°F (22.4°C) in September to a refreshing 59°F (15°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Grassflat, Pennsylvania, with an average temperature fluctuating between 45.9°F (7.7°C) and 31.8°F (-0.1°C). Grassflat's progression into November involves a drop in the average high-temperature, receding from a moderate 59°F (15°C) in October to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Grassflat, is also a wintry month, with an average temperature varying between 36.3°F (2.4°C) and 25.9°F (-3.4°C). The arrival of December indicates a decrease in the average high-temperature, moving from a frosty 45.9°F (7.7°C) in November to a cold 36.3°F (2.4°C). Weather in December »
Updated: Jun 4, 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 time of the year is the coldest?
January, with its high-temperature average of 30.6°F (-0.8°C) and a low-temperature average of 18°F (-7.8°C), is the coldest month.
How much does it rain?
In Grassflat, during the entire year, the rain falls for 159 days and collects up to 23.46" (596mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall in Grassflat.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 18.3 days and typically aggregates up to 6.02" (153mm) of snow.
How many days does it snow?
In Grassflat, during the entire year, snow falls for 67.7 days and aggregates up to 23.54" (598mm) of snow.
What is the month with the least sunshine?
With an average of 3.4h of sunshine, January has the least sunshine of the year.
What is the most humid month?
February is the most humid month, with an average relative humidity of 85%.
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 wettest month?
The month with the most rainfall is May, when the rain falls for 17.9 days and typically aggregates up to 2.87" (73mm) of precipitation.
What is the month with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 5.
When it does not snow?
In Grassflat, snow does not fall in June through September.
When are the longest days in Grassflat?
The month with the longest days in Grassflat is June, with an average of 15h and 6min of daylight.
What part of the year is the hottest?
Temperature readings reach their annual highs in July, averaging 81.3°F (27.4°C) and a minimum average of 59.2°F (15.1°C).
What is the least humid month?
July is the least humid month, with an average relative humidity of 76%.
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 9.9h of sunshine.
What is the driest month?
The month with the least rainfall in Grassflat is November, when the rain falls for 10.5 days and typically collects 1.42" (36mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year in Grassflat, with an average of 9h and 18min of daylight.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Grassflat, PA
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (30.6°F).
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure
Grassflat, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Grassflat, PA
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.2mph - Average wind speed in March:
7.8mph - Average wind speed in April:
8mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Grassflat, PA
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (76%).
Average rainfall
Grassflat, PA
- Average rainfall in January:
1.57" - Average rainfall in February:
1.69" - Average rainfall in March:
1.77" - Average rainfall in April:
2.72" - Average rainfall in May:
2.87" - Average rainfall in June:
2.24"
- Average rainfall in July:
2.2" - Average rainfall in August:
1.57" - Average rainfall in September:
1.65" - Average rainfall in October:
2.17" - Average rainfall in November:
1.42" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days
Grassflat, PA
- Average rainfall days in January:
8.1 days - Average rainfall days in February:
8.7 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.9 days - Average rainfall days in June:
16.4 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
14.7 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
12.7 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
11.4 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (8.1 days).
Average snowfall
Grassflat, PA
- Average snowfall in January:
6.02" - Average snowfall in February:
5.71" - Average snowfall in March:
3.27" - Average snowfall in April:
1.02" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
The month with the highest snowfall is January (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grassflat, PA
- Average snowfall days in January:
18.3 days - Average snowfall days in February:
13.8 days - Average snowfall days in March:
9.2 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
0.5 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:
1.5 days - Average snowfall days in November:
7.3 days - Average snowfall days in December:
13.8 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grassflat, 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 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:
3h and 4min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 2min - Average sunshine in October:
5h and 0min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Grassflat, PA
- Average sunshine days in January:
9.7 days - Average sunshine days in February:
8.7 days - Average sunshine days in March:
12.1 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
11 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.5 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
14.2 days - Average sunshine days in November:
14.1 days - Average sunshine days in December:
10.5 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (8.7 days).
Average UV index
Grassflat, PA
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Grassflat, PA
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility
Grassflat, PA
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Grassflat, Pennsylvania, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location