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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 Grafton, Massachusetts, is another cold winter month, with an average temperature varying between 32.5°F (0.3°C) and 20.5°F (-6.4°C). Temperature records mark January as the coldest month, with highs averaging 32.5°F (0.3°C) and lows at 20.5°F (-6.4°C). Weather in January »
Weather in February
February, the last month of the winter in Grafton, is also a wintry month, with temperature in the range of an average low of 21.6°F (-5.8°C) and an average high of 35.8°F (2.1°C). With the start of February, Grafton measures an average high-temperature of a still icy 35.8°F (2.1°C), not significantly differing from January's 32.5°F (0.3°C). Weather in February »
Weather in March
March, the first month of the spring in Grafton, is a frosty month, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 43.3°F (6.3°C). The arrival of March witnesses a small shift in the average high-temperature, moving from an icy 35.8°F (2.1°C) in February to a frosty 43.3°F (6.3°C). Weather in March »
Weather in April
April in Grafton, Massachusetts, is a moderate spring month, with temperature in the range of an average low of 39°F (3.9°C) and an average high of 55.9°F (13.3°C). In Grafton, the onset of April comes with an increased average high-temperature, moving from March's chilly 43.3°F (6.3°C) to a refreshing 55.9°F (13.3°C). Weather in April »
Weather in May
May, the last month of the spring in Grafton, is a refreshing month, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 67.3°F (19.6°C). The commencement of May sees a shift in the average high-temperature, moving from 55.9°F (13.3°C) in April to a still refreshing 67.3°F (19.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Grafton, Massachusetts, with an average temperature fluctuating between 74.5°F (23.6°C) and 55.6°F (13.1°C). The shift into June is marked by a modest rise in the average high-temperature, moving from May's refreshing 67.3°F (19.6°C) to a moderately hot 74.5°F (23.6°C). Weather in June »
Weather in July
July, like June, in Grafton, Massachusetts, is another warm summer month, with an average temperature varying between 81.7°F (27.6°C) and 62.6°F (17°C). July, with its average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 62.6°F (17°C), holds the record as the warmest month. For most parts of July, the heat index is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Grafton, is also a moderately hot month, with an average temperature fluctuating between 80.1°F (26.7°C) and 61.2°F (16.2°C). A minimal variation is noted in Grafton's average high-temperature at the onset of August, reaching a still warm 80.1°F (26.7°C) from July's 81.7°F (27.6°C). Weather in August »
Weather in September
September, the first month of the autumn in Grafton, is still a pleasant month, with an average temperature ranging between max 72.7°F (22.6°C) and min 54.5°F (12.5°C). During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 80.1°F (26.7°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Grafton, Massachusetts, with an average temperature ranging between max 59.9°F (15.5°C) and min 45.7°F (7.6°C). In the transition to October, Grafton observes a drop in the average high-temperature, moving from a pleasant 72.7°F (22.6°C) in September to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Grafton, Massachusetts, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 48.7°F (9.3°C). Stepping into November, Grafton observes a temperature decline, with the average high falling from October's moderate 59.9°F (15.5°C) to a frosty 48.7°F (9.3°C). Weather in November »
Weather in December
December, the first month of the winter in Grafton, is also a wintry month, with an average temperature fluctuating between 27.3°F (-2.6°C) and 38.3°F (3.5°C). As December arrives, Grafton's weather displays a decrease in high-temperatures, transitioning from November's frosty 48.7°F (9.3°C) to a wintry 38.3°F (3.5°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 is the coldest month?
In Grafton, January is known for its average lowest temperatures, reaching a high of 32.5°F (0.3°C) and a low of 20.5°F (-6.4°C).
How much does it rain?
Throughout the year, there are 152.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, November and December.
How many days does it snow?
In Grafton, during the entire year, snow falls for 32.5 days and aggregates up to 18.78" (477mm) of snow.
When is the lowest UV index in Grafton?
January through March, November and December, with an average maximum UV index of 2, 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 80%.
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.6h of sunshine.
When does it snow the most?
March is the month with the most snowfall. Snow falls for 8.3 days and accumulates 4.92" (125mm) of snow.
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 71%, April is the least humid month.
When it does not snow?
In Grafton, snow does not fall in June through October.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
July, recording an average high temperature of 81.7°F (27.6°C) and a low temperature of 62.6°F (17°C), is Grafton's warmest month.
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10.1h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 1.54" (39mm) of precipitation.
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 10.3 days and accumulates 3.15" (80mm) of precipitation.
What is the month with the shortest days in Grafton?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Grafton, MA
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.5°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Grafton, MA
- Average pressure in January:
30.01"Hg - Average pressure in February:
30"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"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 (29.93"Hg).
Average wind speed
Grafton, MA
- Average wind speed in January:
8.9mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.4mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.5mph - Average wind speed in November:
8mph - Average wind speed in December:
8.5mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity
Grafton, MA
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Grafton, MA
- Average rainfall in January:
2.48" - Average rainfall in February:
2.28" - Average rainfall in March:
2.72" - Average rainfall in April:
2.83" - Average rainfall in May:
2.48" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.68" - Average rainfall in August:
2.36" - Average rainfall in September:
1.54" - Average rainfall in October:
2.72" - Average rainfall in November:
2.76" - Average rainfall in December:
3.15"
The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days
Grafton, MA
- Average rainfall days in January:
7.7 days - Average rainfall days in February:
8 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
14 days - Average rainfall days in November:
10.3 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (7.7 days).
Average snowfall
Grafton, MA
The month with the highest snowfall is March (4.92").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Grafton, MA
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
8.3 days - Average snowfall days in April:
1.4 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 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Grafton, MA
- Average daylight in January:
9h and 3min - 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:
5h and 0min - Average sunshine in February:
4h and 4min - Average sunshine in March:
5h and 5min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
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 36min).
Average sunshine days
Grafton, MA
- Average sunshine days in January:
16.5 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
13.5 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
18 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (11.8 days).
Average UV index
Grafton, MA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Grafton, MA
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility
Grafton, MA
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Grafton, Massachusetts, USA
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