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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 fluctuating between 13.3°F (-10.4°C) and 25.9°F (-3.4°C). With an average high-temperature of 25.9°F (-3.4°C) and an average low-temperature of 13.3°F (-10.4°C), January is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Grantham, is also a subzero cold month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 14.7°F (-9.6°C). During February, Grantham records an average high-temperature of a still subzero cold 28.8°F (-1.8°C), marking a slight divergence from January's 25.9°F (-3.4°C). Weather in February »
Weather in March
The first month of the spring, March, is an icy month in Grantham, New Hampshire, 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 showcases a minor temperature ascent, adjusting from February's freezing cold 28.8°F (-1.8°C) to a cold 37°F (2.8°C). Weather in March »
Weather in April
April is a cool spring month in Grantham, New Hampshire, with temperature in the range of an average low of 33.4°F (0.8°C) and an average high of 50.9°F (10.5°C). Grantham's transition into April brings a rise in the average high-temperature, moving from a wintry 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 refreshing month, with temperature in the range of an average low of 44.4°F (6.9°C) and an average high of 64.9°F (18.3°C). The shift into May is accompanied by a temperature increase, with the average high-temperature rising from a cool 50.9°F (10.5°C) in April to a comfortable 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Grantham, New Hampshire, with an average temperature fluctuating between 72°F (22.2°C) and 50.9°F (10.5°C). June's arrival coincides with a subtle temperature rise, moving from May's enjoyable 64.9°F (18.3°C) to an agreeable 72°F (22.2°C). Weather in June »
Weather in July
July is a moderately hot summer month in Grantham, New Hampshire, with an average temperature fluctuating between 57.2°F (14°C) and 78.8°F (26°C). In Grantham, the average temperatures in July are the highest, with a peak at 78.8°F (26°C) and a low of 57.2°F (14°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Grantham, New Hampshire, with an average temperature varying between 76.6°F (24.8°C) and 55.6°F (13.1°C). Grantham's August average high-temperature settles at a still warm 76.6°F (24.8°C), showing a near match with the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Grantham, is also an agreeable month, with an average temperature varying between 68.9°F (20.5°C) and 49.3°F (9.6°C). The transition into September subtly indicates a reduction in the average high-temperature, down to a pleasant 68.9°F (20.5°C) from August's moderately hot 76.6°F (24.8°C). Weather in September »
Weather in October
October, the same as September, in Grantham, New Hampshire, is another mild autumn month, with an average temperature ranging between max 55.9°F (13.3°C) and min 40.6°F (4.8°C). Arrival of October comes with a reduction in the average high-temperature, falling from an agreeable 68.9°F (20.5°C) in September to a moderate 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 ranging between min 29.8°F (-1.2°C) and max 42.6°F (5.9°C). The arrival of November corresponds with a reduction in the average high-temperature, down from October's refreshing 55.9°F (13.3°C) 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). In December, the meteorological conditions alter, with the average high-temperature shifting from a cold 42.6°F (5.9°C) in November to a subzero cold 31.6°F (-0.2°C). Weather in December »
Updated: Aug 26, 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?
During the coldest month in Grantham, January, temperatures average 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?
January and February, with an average relative humidity of 86%, are most humid months.
How much does it rain?
Throughout the year, there are 153.2 rainfall days, and 29.92" (760mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, there are 65.4 snowfall days, and 42.72" (1085mm) of snow is accumulated.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 14.3 days and typically aggregates up to 11.18" (284mm) of snow.
What is the month with the least sunshine?
With an average of 4h of sunshine, February has the least sunshine of the year.
What are the months with the lowest UV index?
February and December, with an average maximum UV index of 1, are months with the lowest UV index.
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?
With an average relative humidity of 75%, April is the least humid month.
What are the months with the highest UV index?
May through August, with an average maximum UV index of 5, are months with the highest UV index.
When it does not snow in Grantham?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 24min of daylight.
What part of the year is the hottest?
In Grantham, July is the month with the highest recorded average temperatures, measuring a high of 78.8°F (26°C) and a low of 57.2°F (14°C).
What month has the most sunshine?
August has the most sunshine of the year, with an average of 10.1h of sunshine.
What is the driest month?
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?
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?
December has the shortest days of the year, 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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