Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Richmond, entering September brings a subtle temperature decrement, reducing from August's warm 77.4°F (25.2°C) to a pleasant 70.2°F (21.2°C). The temperature dips to an average of 50.9°F (10.5°C) during September nights.Humidity
The average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 7.4 days and typically collects 0.35" (9mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:27 pm. On the last day of September, in Richmond, Massachusetts, sunrise is at 6:50 am and sunset at 6:36 pm EDT.
Sunshine
In September, the average sunshine in Richmond is 8.5h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 3 in September transforms into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What are the temperatures in Richmond in September?
What is the average humidity in September in Richmond?
What is the driest month in Richmond?
How much does it rain in Richmond in September?
When it does not snow in Richmond?
Does it snow in Richmond in September?
How many hours of daylight does Richmond have in September?
When is the sunrise / sunset in September in Richmond?
How many hours of sunshine does Richmond have in September?
How high is the UV index in September in Richmond?
Average temperature in September
Richmond, MA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Richmond, MA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Richmond, MA
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Richmond, MA
- Average humidity in September: 80%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Richmond, MA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is July (0.83").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Richmond, MA
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is July (11 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Richmond, MA
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Richmond, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Richmond, MA
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Richmond, MA
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (17.1 days).
Average UV index in September
Richmond, MA
- Average UV index in September: 3
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, March, October, November and December (UV index 2).
Average cloud cover in September
Richmond, MA
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Richmond, MA
- Average visibility in September: 5mi
The months with the highest visibility are April and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and November (5mi).
Richmond, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
