September weather forecastRumsey, CA
September
Weather in September
September, the first month of the autumn in Rumsey, is still a tropical month, with an average temperature ranging between max 89.8°F (32.1°C) and min 59.9°F (15.5°C).Temperature
September is characterized by a slight reduction in average high-temperature, easing from a sweltering 95.9°F (35.5°C) in August to a tropical 89.8°F (32.1°C). In September, Rumsey endures a notable temperature shift from day to night, with lows averaging at a refreshing 59.9°F (15.5°C).Humidity
With an average relative humidity of 38%, September is the least humid month.Rainfall
In September, the rain falls for 1.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Rumsey, during the entire year, the rain falls for 70.9 days and collects up to 12.13" (308mm) of precipitation.Snowfall
In Rumsey, California, snow does not fall in January, March through December.Daylight
In Rumsey, California, the average length of the day in September is 12h and 25min.On the first day of September in Rumsey, sunrise is at 6:38 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rumsey, CA
- Average high temperature in September: 89.8°F
The warmest month (with the highest average high temperature) is July (97.2°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (41.7°F).
Average pressure in September
Rumsey, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Rumsey, CA
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are February and March (6.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Rumsey, CA
- Average humidity in September: 38%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is September (38%).
Average rainfall in September
Rumsey, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (2.44").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Rumsey, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is July (0.8 days).
Average snowfall days in September
Rumsey, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Rumsey, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Rumsey, CA
- Average sunshine days in September: 28 days
The months with the most sunshine days are July and August (29.6 days).
The month with the least sunshine days is March (17.2 days).
Average UV index in September
Rumsey, CA
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Rumsey, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Rumsey, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
