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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 Grantley, Pennsylvania, is a wintry winter month, with an average temperature varying between 35.8°F (2.1°C) and 23.4°F (-4.8°C). The month of January, characterized by an average high of 35.8°F (2.1°C) and a low of 23.4°F (-4.8°C), is recognized as the coldest. Weather in January »
Weather in February
February, the last month of the winter in Grantley, is also a wintry month, with an average temperature varying between 39.4°F (4.1°C) and 25.2°F (-3.8°C). During February, Grantley observes a subtle ascent to a still wintry 39.4°F (4.1°C) from January's 35.8°F (2.1°C) in the average high-temperature. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Grantley, Pennsylvania, with an average temperature varying between 48.2°F (9°C) and 32.9°F (0.5°C). As February transitions into March, Grantley notices a gentle rise in the average high-temperature, transitioning from a cold 39.4°F (4.1°C) to a chilly 48.2°F (9°C). Weather in March »
Weather in April
April is a refreshing spring month in Grantley, Pennsylvania, with temperature in the range of an average high of 60.4°F (15.8°C) and an average low of 42.8°F (6°C). With the onset of April, the average high-temperature slightly shifts from March's chilly 48.2°F (9°C) to a mild 60.4°F (15.8°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Grantley, Pennsylvania, with an average temperature fluctuating between 52.9°F (11.6°C) and 70.3°F (21.3°C). May's arrival brings a temperature shift, moving from a refreshing 60.4°F (15.8°C) in April to a pleasant 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Grantley, is a moderately hot month, with an average temperature ranging between min 60.4°F (15.8°C) and max 77.9°F (25.5°C). With the beginning of June, Grantley's average high-temperature sees a minor increase, transitioning 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, the same as June, is another warm summer month in Grantley, Pennsylvania, with an average temperature fluctuating between 65.5°F (18.6°C) and 83.5°F (28.6°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 83.5°F (28.6°C) and a low of 65.5°F (18.6°C). July's mean heat index is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Grantley, Pennsylvania, with an average temperature varying between 63.9°F (17.7°C) and 81°F (27.2°C). Grantley records an average high-temperature of a still moderately hot 81°F (27.2°C) in August, closely mirroring the climate of the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Grantley, is also a moderately hot month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 57.2°F (14°C). As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 81°F (27.2°C) to a still warm 75°F (23.9°C). Weather in September »
Weather in October
October, like September, in Grantley, Pennsylvania, is another comfortable autumn month, with an average temperature varying between 63.1°F (17.3°C) and 47.5°F (8.6°C). October brings a decrease in the average high-temperature, falling from September's moderately hot 75°F (23.9°C) to an enjoyable 63.1°F (17.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Grantley, is also a fresh month, with temperature in the range of an average high of 50.9°F (10.5°C) and an average low of 36.3°F (2.4°C). Stepping into November, Grantley observes a temperature decline, with the average high falling from October's refreshing 63.1°F (17.3°C) to a fresh 50.9°F (10.5°C). Weather in November »
Weather in December
December, the first month of the winter in Grantley, is also an icy month, with an average temperature fluctuating between 41.9°F (5.5°C) and 30.4°F (-0.9°C). The decrease of average high-temperatures is mild in December, with a decline from a cool 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). Weather in December »
Updated: Aug 9, 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?
The lowest temperatures are recorded in January, with averages reaching a high of 35.8°F (2.1°C) and a low of 23.4°F (-4.8°C).
How many days does it rain?
In Grantley, during the entire year, the rain falls for 139.8 days and collects up to 22.95" (583mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
In Grantley, during the entire year, snow falls for 18.4 days and aggregates up to 9.13" (232mm) of snow.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month?
The month with the least rainfall in Grantley is February, when the rain falls for 6.7 days and typically collects 1.26" (32mm) of precipitation.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.7h of sunshine.
What is the least humid month?
March, April and November, with an average relative humidity of 76%, are the least humid months.
When does it snow the most in Grantley?
The month with the most snowfall is March, when snow falls for 4.5 days and typically aggregates up to 3.23" (82mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grantley, 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 most humid month?
With an average relative humidity of 81%, May is the most humid month.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When it does not snow?
In Grantley, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 0min of daylight.
What month is the hottest?
In Grantley, July is known for its average highest temperatures, reaching a high of 83.5°F (28.6°C) and a low of 65.5°F (18.6°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.6h of sunshine.
What is the wettest month?
The month with the most rainfall is August, when the rain falls for 15 days and typically aggregates up to 2.8" (71mm) of precipitation.
What is the month with the shortest days in Grantley?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Grantley, PA
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.8°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
Grantley, 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:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"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:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Grantley, PA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.8mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.7mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.6mph - Average wind speed in December:
8.2mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Grantley, PA
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March, April and November (76%).
Average rainfall
Grantley, PA
- Average rainfall in January:
1.38" - Average rainfall in February:
1.26" - Average rainfall in March:
1.69" - Average rainfall in April:
1.89" - Average rainfall in May:
2.24" - Average rainfall in June:
2.01"
- Average rainfall in July:
2.36" - Average rainfall in August:
2.8" - Average rainfall in September:
1.61" - Average rainfall in October:
2.09" - Average rainfall in November:
2.01" - Average rainfall in December:
1.61"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days
Grantley, PA
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
15 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
8.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Grantley, PA
- Average snowfall in January:
2.13" - Average snowfall in February:
1.65" - Average snowfall in March:
3.23" - Average snowfall in April:
0.2" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grantley, PA
- Average snowfall days in January:
4.3 days - Average snowfall days in February:
5 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
0.6 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:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
3 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grantley, 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:
4h and 5min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
10h and 0min
- 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 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Grantley, PA
- Average sunshine days in January:
20.4 days - Average sunshine days in February:
17.2 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
14 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
12.7 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
13.5 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is May (11.7 days).
Average UV index
Grantley, 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, November and December (UV index 2).
Average cloud cover
Grantley, PA
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Grantley, 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).
Grantley, Pennsylvania, USA
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