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
As September arrives, Foster's weather displays a minor decrease in high-temperatures, transitioning from August's warm 79.7°F (26.5°C) to an agreeable 72.3°F (22.4°C). An average nighttime temperature of 55.4°F (13°C) is recorded in Foster during September.Humidity
The months with the highest humidity in Foster are February, June, July, September and October, with an average relative humidity of 79%.Rainfall
September is the month with the least rainfall. Rain falls for 13.6 days and accumulates 1.81" (46mm) of precipitation.Snowfall
In Foster, snow does not fall in June through October.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September in Foster, sunrise is at 6:13 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:29 pm EDT.
Sunshine
In Foster, Rhode Island, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the average September temperature in Foster?
What is the most humid month in Foster?
What is the average humidity in September in Foster?
What is the driest month in Foster?
How much does it rain in Foster in September?
When it does not snow in Foster?
How many hours of daylight does Foster have in September?
What time are sunrise and sunset in September in Foster?
How long on average sun shines in September in Foster?
What is the UV index intensity in September in Foster?
Average temperature in September
Foster, RI
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Foster, RI
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Foster, RI
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Foster, RI
- Average humidity in September: 79%
The months with the highest relative humidity are February, June, July, September and October (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Foster, RI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Foster, RI
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Foster, RI
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Foster, RI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Foster, RI
- 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 12min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Foster, RI
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Foster, RI
- Average UV index in September: 4
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 September
Foster, RI
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Foster, RI
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
Foster, Rhode Island, USA
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