Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
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). During August nights, Grafton records an average temperature of 61.2°F (16.2°C).Humidity
In Grafton, the average relative humidity in August is 77%.Rainfall
In August, the rain falls for 14.8 days. Throughout August, 2.36" (60mm) of precipitation is accumulated. In Grafton, during the entire year, the rain falls for 152.2 days and collects up to 30.67" (779mm) of precipitation.Snowfall
In Grafton, snow does not fall in June through October.Daylight
The average length of the day in August is 13h and 50min.On the first day of the month, sunrise is at 5:40 am and sunset at 8:05 pm. On the last day of August, sunrise is at 6:11 am and sunset at 7:21 pm EDT.
Sunshine
August has the most sunshine of the year, with an average of 10.1h of sunshine.UV index
The months with the highest UV index in Grafton are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 6 in August translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Grafton?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Grafton have in August?
When is the sunrise / sunset in August?
What month has the most sunshine in Grafton?
How long on average sun shines in August?
What is the month with the highest UV index?
What is the UV index intensity in August?
Average temperature in August
Grafton, MA
- Average high temperature in August: 80.1°F
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).
- Average low temperature in August: 61.2°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 in August
Grafton, MA
- Average pressure in August: 29.98"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 in August
Grafton, MA
- Average wind speed in August: 5.7mph
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 in August
Grafton, MA
- Average humidity in August: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in August
Grafton, MA
- Average rainfall in August: 2.36"
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 in August
Grafton, MA
- Average rainfall days in August: 14.8 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 in August
Grafton, MA
- Average snowfall in August: 0"
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 in August
Grafton, MA
- Average snowfall days in August: 0 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 in August /
Average sunshine in August
Grafton, MA
- Average daylight in August: 13h and 5min
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 August: 10h and 1min
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 in August
Grafton, MA
- Average sunshine days in August: 14 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 in August
Grafton, MA
- Average UV index in August: 6
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 in August
Grafton, MA
- Average cloud cover in August: 36
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 in August
Grafton, MA
- Average visibility in August: 5mi
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
Weather forecast for your location
2. Allow the app to use your location