September weather forecastRipon, CA
September
Weather in September
September, the first month of the autumn in Ripon, is still a tropical month, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 58.3°F (14.6°C).Temperature
Ripon's average high-temperature in September sits at a still hot 88.7°F (31.5°C), showing little difference from the previous month. Ripon records a marked divergence from the day's high temperatures, with nights in September averaging at a moderate 58.3°F (14.6°C).Heat index
The heat index value during September is evaluated at a tropical 89.6°F (32°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
In September, the average relative humidity is 45%.Rainfall
In Ripon, in September, during 2.1 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Ripon, during the entire year, the rain falls for 67.8 days and collects up to 11.22" (285mm) of precipitation.Snowfall
In Ripon, snow does not fall in January through November.Daylight
In September, the average length of the day in Ripon is 12h and 25min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:33 pm. On the last day of September, in Ripon, sunrise is at 6:59 am and sunset at 6:48 pm PDT.
Sunshine
The average sunshine in September is 11.5h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 in September translates into these instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ripon, CA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.9°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).
Average pressure in September
Ripon, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Ripon, CA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in September
Ripon, CA
- Average humidity in September: 45%
The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is July (42%).
Average rainfall in September
Ripon, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Ripon, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (12 days).
The month with the least rainy days is August (1.2 days).
Average snowfall days in September
Ripon, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Ripon, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Ripon, CA
- Average sunshine days in September: 26.9 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in September
Ripon, CA
- Average UV index in September: 5
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
Ripon, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Ripon, 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).
