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 Grand Valley, Pennsylvania, with temperature in the range of an average low of 18°F (-7.8°C) and an average high of 29.5°F (-1.4°C). Grand Valley reaches its lowest average temperatures in January, measuring 29.5°F (-1.4°C) at the peak and 18°F (-7.8°C) at the lowest. Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Grand Valley, Pennsylvania, with an average temperature varying between 32.5°F (0.3°C) and 18.9°F (-7.3°C). Grand Valley in February witnesses an average high-temperature of a wintry 32.5°F (0.3°C), indicating a slight variation from January's 29.5°F (-1.4°C). Weather in February »
Weather in March
The first month of the spring, March, is also an icy month in Grand Valley, Pennsylvania, with an average temperature varying between 42.3°F (5.7°C) and 27°F (-2.8°C). March's onset brings a rise in the average high-temperature, moving from 32.5°F (0.3°C) in February to a still wintry 42.3°F (5.7°C). Weather in March »
Weather in April
April is a fresh spring month in Grand Valley, Pennsylvania, with an average temperature fluctuating between 36.9°F (2.7°C) and 54.9°F (12.7°C). The arrival of April signals an increase in the average high-temperature, moving from a cold 42.3°F (5.7°C) in March to a fresh 54.9°F (12.7°C). Weather in April »
Weather in May
May, the last month of the spring in Grand Valley, is an enjoyable month, with an average temperature ranging between min 47.3°F (8.5°C) and max 67.1°F (19.5°C). The arrival of May brings a change in Grand Valley's weather, with average high-temperatures moving from April's cool 54.9°F (12.7°C) to a refreshing 67.1°F (19.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Grand Valley, Pennsylvania, with an average temperature fluctuating between 74.7°F (23.7°C) and 54°F (12.2°C). The transition from May to June brings a subtle temperature rise, with average high-temperatures increasing from a refreshing 67.1°F (19.5°C) to a warm 74.7°F (23.7°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Grand Valley, Pennsylvania, with an average temperature varying between 78.8°F (26°C) and 58.6°F (14.8°C). In Grand Valley, the highest average temperatures are observed in July, with a high of 78.8°F (26°C) and a low of 58.6°F (14.8°C). Weather in July »
Weather in August
August, the last month of the summer in Grand Valley, is another warm month, with an average temperature varying between 56.8°F (13.8°C) and 77.4°F (25.2°C). August brings an average high-temperature of a still warm 77.4°F (25.2°C), nearly identical to the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Grand Valley, Pennsylvania, with temperature in the range of an average high of 71.4°F (21.9°C) and an average low of 52.2°F (11.2°C). Grand Valley in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 77.4°F (25.2°C) in August to a pleasant 71.4°F (21.9°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Grand Valley, Pennsylvania, with an average temperature fluctuating between 58.3°F (14.6°C) and 43°F (6.1°C). The shift to October brings a decrease in the average high-temperature, falling from an agreeable 71.4°F (21.9°C) in September to a refreshing 58.3°F (14.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Valley, is also a frosty month, with an average temperature varying between 32°F (0°C) and 45.1°F (7.3°C). November brings a decrease in the average high-temperature, falling from October's moderate 58.3°F (14.6°C) to a chilly 45.1°F (7.3°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Grand Valley, Pennsylvania, with an average temperature varying between 35.6°F (2°C) and 25.7°F (-3.5°C). Grand Valley's progression into December includes a drop in the average high-temperature, from a chilly 45.1°F (7.3°C) in November to an icy 35.6°F (2°C). Weather in December »
Updated: Aug 6, 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?
Grand Valley experiences its average lowest temperatures in January, reaching a peak of 29.5°F (-1.4°C) and a minimum of 18°F (-7.8°C).
How many days does it rain?
Throughout the year, there are 160.2 rainfall days, and 23.43" (595mm) of precipitation is accumulated.
When does it snow in Grand Valley?
January through May, October through December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 21.8 days and accumulates 7.28" (185mm) of snow.
How many days does it snow in Grand Valley?
In Grand Valley, during the entire year, snow falls for 85.6 days and aggregates up to 26.54" (674mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 2.2h of sunshine.
What are the months with the lowest UV index?
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the most humid month?
February is the most humid month, with an average relative humidity of 90%.
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?
The month with the most rainfall is April, when the rain falls for 15.8 days and typically aggregates up to 2.32" (59mm) of precipitation.
What is the least humid month?
May is the least humid month, with an average relative humidity of 79%.
What are the months 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 Grand Valley?
June through September are months without snowfall in Grand Valley.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What is the warmest month?
With its average high temperature of 78.8°F (26°C) and a low of 58.6°F (14.8°C), July is regarded as the warmest month.
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 9.8h of sunshine.
What is the driest month?
November is the month with the least rainfall. Rain falls for 10.8 days and accumulates 1.57" (40mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Grand Valley, PA
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (29.5°F).
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure
Grand Valley, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Grand Valley, PA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8mph - Average wind speed in April:
8mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.7mph - Average wind speed in December:
8.2mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity
Grand Valley, PA
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (79%).
Average rainfall
Grand Valley, PA
- Average rainfall in January:
2.05" - Average rainfall in February:
1.69" - Average rainfall in March:
1.85" - Average rainfall in April:
2.32" - Average rainfall in May:
2.24" - Average rainfall in June:
2.17"
- Average rainfall in July:
2.01" - Average rainfall in August:
1.73" - Average rainfall in September:
1.69" - Average rainfall in October:
2.2" - Average rainfall in November:
1.57" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is April (2.32").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days
Grand Valley, PA
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
16.2 days - Average rainfall days in August:
16.5 days - Average rainfall days in September:
14 days - Average rainfall days in October:
15.9 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
10.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (7.5 days).
Average snowfall
Grand Valley, PA
- Average snowfall in January:
7.28" - Average snowfall in February:
5.51" - Average snowfall in March:
2.87" - Average snowfall in April:
1.26" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is January (7.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grand Valley, PA
- Average snowfall days in January:
21.8 days - Average snowfall days in February:
17.8 days - Average snowfall days in March:
11.1 days - Average snowfall days in April:
4.6 days - Average snowfall days in May:
0.8 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:
9.9 days - Average snowfall days in December:
18.1 days
The month with the highest number of snowfall days is January (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grand Valley, 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 4min - 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 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
2h and 1min - Average sunshine in February:
2h and 3min - Average sunshine in March:
5h and 0min - Average sunshine in April:
6h and 5min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 1min - Average sunshine in October:
4h and 3min - Average sunshine in November:
4h and 1min - Average sunshine in December:
2h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days
Grand Valley, PA
- Average sunshine days in January:
5.3 days - Average sunshine days in February:
6.4 days - Average sunshine days in March:
11.7 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
11.2 days - Average sunshine days in September:
13.1 days - Average sunshine days in October:
13.3 days - Average sunshine days in November:
12.4 days - Average sunshine days in December:
6.9 days
The month with the most sunshine days is October (13.3 days).
The month with the least sunshine days is January (5.3 days).
Average UV index
Grand Valley, PA
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover
Grand Valley, PA
The month with the most cloud cover is January (Cloud cover 78).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility
Grand Valley, PA
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
Grand Valley, 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