September weather forecast
Ripon, CA

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Weather in September

September, the first month of the autumn in Ripon, is still a hot month, with an average temperature varying between 58.3°F (14.6°C) and 88.7°F (31.5°C).

Temperature

In September, Ripon's weather conditions record an average high-temperature of a still hot 88.7°F (31.5°C), demonstrating little divergence from the preceding month. The nighttime temperature shows a significant divergence from the daytime highs, averaging at a refreshing 58.3°F (14.6°C) in September.

Heat index

The heat index value for September is evaluated at a hot 89.6°F (32°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

In September, the average relative humidity in Ripon is 45%.

Rainfall

In September, the rain falls for 2.1 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 67.8 rainfall days, and 11.22" (285mm) of precipitation is accumulated.

Snowfall

In Ripon, snow does not fall in January through November.

Daylight

In Ripon, California, the average length of the day in September 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

In Ripon, the average sunshine in September is 11.5h.

UV index

In Ripon, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 5 transforms into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

Is it hot in Ripon during September?

During September, Ripon experiences an average high-temperature of 88.7°F (31.5°C) and a low-temperature of 58.3°F (14.6°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 89.6°F (32°C).

What is the average humidity in September in Ripon?

In September, the average relative humidity in Ripon, California, is 45%.

How many days does it rain in September in Ripon?

In Ripon, during September, the rain falls for 2.1 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in Ripon?

In Ripon, California, snow does not fall in January through November.

How many hours of daylight does Ripon have in September?

In September, the average day length in Ripon, California, is 12h and 25min.

When is the sunrise / sunset in September in Ripon?

In September, on the first day of the month, sunrise is at 6:35 am and sunset at 7:33 pm. On the last day of the month, in Ripon, sunrise is at 6:59 am and sunset at 6:48 pm PDT.

How long on average sun shines in September in Ripon?

The average sunshine duration in September is 11.5h.

What is the UV index reading in September in Ripon?

The average daily maximum UV index in September in Ripon, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Ripon, CA

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).

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Average pressure in September
Ripon, CA

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).

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Average wind speed in September
Ripon, CA

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).

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Average humidity in September
Ripon, CA

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%).

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Average rainfall in September
Ripon, CA

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").

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Average rainfall days in September
Ripon, CA

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).

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Average snowfall days in September
Ripon, CA

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).

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Average daylight in September /
Average sunshine in September
Ripon, CA

Average daylight in September / Average sunshine in September - Ripon, CA
  • Average daylight in September: 12h and 2min

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 3min

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).

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Average sunshine days in September
Ripon, CA

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).

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Average UV index in September
Ripon, CA

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).

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Average cloud cover in September
Ripon, CA

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).

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Average visibility in September
Ripon, CA

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).

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Ripon, California, USA

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