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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 a freezing cold winter month in Grantham, New Hampshire, with an average temperature ranging between max 25.9°F (-3.4°C) and min 13.3°F (-10.4°C). January is the coldest month, with the temperature often reaching an average high of 25.9°F (-3.4°C) and an average low of 13.3°F (-10.4°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Grantham, New Hampshire, with an average temperature ranging between max 28.8°F (-1.8°C) and min 14.7°F (-9.6°C). February denotes a minimal variation in the average high-temperature to a still subzero cold 28.8°F (-1.8°C) from January's 25.9°F (-3.4°C). Weather in February »
Weather in March
March, the first month of the spring in Grantham, is a cold month, with temperature in the range of an average low of 22.5°F (-5.3°C) and an average high of 37°F (2.8°C). March brings a slight rise in Grantham's average high-temperature, moving from a subzero cold 28.8°F (-1.8°C) in February to a wintry 37°F (2.8°C). Weather in March »
Weather in April
April is a cool spring month in Grantham, New Hampshire, with an average temperature varying between 50.9°F (10.5°C) and 33.4°F (0.8°C). As Grantham transitions into April, the average high-temperature is observed to rise from an icy 37°F (2.8°C) in March to a fresh 50.9°F (10.5°C). Weather in April »
Weather in May
May, the last month of the spring in Grantham, is a comfortable month, with an average temperature fluctuating between 44.4°F (6.9°C) and 64.9°F (18.3°C). May shows a rise in the average high-temperature, moving from April's cool 50.9°F (10.5°C) to an enjoyable 64.9°F (18.3°C). Weather in May »
Weather in June
June, the first month of the summer in Grantham, is a pleasant month, with an average temperature varying between 72°F (22.2°C) and 50.9°F (10.5°C). As May transitions into June, Grantham notices a gentle rise in the average high-temperature, transitioning from an enjoyable 64.9°F (18.3°C) to an agreeable 72°F (22.2°C). Weather in June »
Weather in July
July is a warm summer month in Grantham, New Hampshire, with an average temperature varying between 78.8°F (26°C) and 57.2°F (14°C). Grantham's July weather, marked by an average high temperature of 78.8°F (26°C) and an average low temperature of 57.2°F (14°C), is the warmest in the year. Weather in July »
Weather in August
August, the last month of the summer in Grantham, is also a moderately hot month, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 55.6°F (13.1°C). Welcoming August, Grantham notes an average high-temperature of a still warm 76.6°F (24.8°C), nearly consistent with July's 78.8°F (26°C). Weather in August »
Weather in September
September, the first month of the autumn in Grantham, is still a pleasant month, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 49.3°F (9.6°C). In Grantham, entering September brings a subtle temperature decrement, reducing from August's moderately hot 76.6°F (24.8°C) to an agreeable 68.9°F (20.5°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Grantham, New Hampshire, with an average temperature varying between 40.6°F (4.8°C) and 55.9°F (13.3°C). October brings a minor decrease, with the average high-temperature reducing from an agreeable 68.9°F (20.5°C) in September to a refreshing 55.9°F (13.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a wintry month in Grantham, New Hampshire, with an average temperature varying between 42.6°F (5.9°C) and 29.8°F (-1.2°C). The onset of November entails a temperature shift, as the average high-temperature decreases from a mild 55.9°F (13.3°C) in October to an icy 42.6°F (5.9°C). Weather in November »
Weather in December
December, the first month of the winter in Grantham, is also a subzero cold month, with an average temperature varying between 31.6°F (-0.2°C) and 21°F (-6.1°C). During the transition into December, Grantham observes a decrease in the average high-temperature, falling from a wintry 42.6°F (5.9°C) in November to a freezing cold 31.6°F (-0.2°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Grantham?
The coldest period tends to be January, when average temperatures fluctuate between a high of 25.9°F (-3.4°C) and a low of 13.3°F (-10.4°C).
What are the most humid months in Grantham?
The months with the highest humidity are January and February, with an average relative humidity of 86%.
How many days does it rain in Grantham?
In Grantham, New Hampshire, during the entire year, the rain falls for 153.2 days and collects up to 29.92" (760mm) of precipitation.
When does it snow in Grantham?
Months with snowfall in Grantham, New Hampshire, are January through May, October through December.
How many days does it snow in Grantham?
In Grantham, during the entire year, snow falls for 65.4 days and aggregates up to 42.72" (1085mm) of snow.
What is the snowiest month in Grantham?
February is the month with the most snowfall in Grantham, New Hampshire. Snow falls for 14.3 days and accumulates 11.18" (284mm) of snow.
What is the month with the least sunshine in Grantham?
February has the least sunshine of the year, with an average of 4h of sunshine.
When is the lowest UV index in Grantham?
The months with the lowest UV index in Grantham, New Hampshire, are February and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Grantham?
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 Grantham?
With an average relative humidity of 75%, April is the least humid month in Grantham, New Hampshire.
What are the months with the highest UV index in Grantham?
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 Grantham?
In Grantham, New Hampshire, snow does not fall in June through September.
When are the longest days in Grantham?
With an average of 15h and 24min of daylight, June has the longest days of the year.
What are the warmest months in Grantham?
Grantham, New Hampshire, experiences its highest temperatures in July, with an average peak of 78.8°F (26°C) and a low of 57.2°F (14°C).
What month has the most sunshine in Grantham?
August has the most sunshine of the year in Grantham, New Hampshire, with an average of 10.1h of sunshine.
What is the driest month in Grantham?
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 2.05" (52mm) of precipitation.
What is the wettest month in Grantham?
The month with the most rainfall is October, when the rain falls for 14 days and typically aggregates up to 3.39" (86mm) of precipitation.
What is the month with the shortest days in Grantham?
The month with the shortest days in Grantham is December, with an average of 9h and 0min of daylight.
Average temperature
Grantham, NH
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (25.9°F).
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure
Grantham, NH
- Average pressure in January:
30.02"Hg - Average pressure in February:
30"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Grantham, NH
- Average wind speed in January:
7.6mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.6mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6.7mph - Average wind speed in December:
7.2mph
The windiest months (with the highest average wind speed) are January, February, March and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Grantham, NH
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall
Grantham, NH
- Average rainfall in January:
2.2" - Average rainfall in February:
2.24" - Average rainfall in March:
2.17" - Average rainfall in April:
2.72" - Average rainfall in May:
2.4" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.52" - Average rainfall in August:
2.09" - Average rainfall in September:
2.05" - Average rainfall in October:
3.39" - Average rainfall in November:
2.56" - Average rainfall in December:
2.91"
The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days
Grantham, NH
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
7.9 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
16 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
14 days - Average rainfall days in November:
11.1 days - Average rainfall days in December:
10.9 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (7.9 days).
Average snowfall
Grantham, NH
- Average snowfall in January:
8.62" - Average snowfall in February:
11.18" - Average snowfall in March:
7.09" - Average snowfall in April:
3.5" - Average snowfall in May:
0.47" - Average snowfall in June:
0"
The month with the highest snowfall is February (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grantham, NH
- Average snowfall days in January:
13.3 days - Average snowfall days in February:
14.3 days - Average snowfall days in March:
12.7 days - Average snowfall days in April:
5 days - Average snowfall days in May:
0.6 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:
1.3 days - Average snowfall days in November:
6.2 days - Average snowfall days in December:
12 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grantham, NH
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 1min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days
Grantham, NH
- Average sunshine days in January:
13.8 days - Average sunshine days in February:
11.3 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
13.9 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
13.5 days - Average sunshine days in November:
15.3 days - Average sunshine days in December:
13.4 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (11.3 days).
Average UV index
Grantham, NH
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Grantham, NH
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility
Grantham, NH
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Grantham, New Hampshire, USA
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