United StatesAverage weather for Idyllwild in September
It's hot in September in Idyllwild with an average temperature of 37°C. Temperatures this month range from a low of 34°C to a high of 41°C. At night, you can expect temperatures between 20°C and 26°C.
Start of September
The month of September starts in Idyllwild with hot temps, averaging around 39°C during the day and nights around 26°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 38°C, with nights around 23°C. Not much precipitation expected during this period. It’s mostly dry and sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of September
By the end of September, the average daytime temperature in Idyllwild is around 36°C, while nighttime temps are about 22°C. No precipitation expected at the end of the month; it’ll be mostly sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In September, there is an average of 17 mm of precipitation, spread over 1 day. The wind speed is around 4 Bft, mostly coming from the Southwest.
Idyllwild in September |
New York | ||
|---|---|---|---|
 Average temperature |
37°C | 27°C | |
 Max. temperature |
41°C | 31°C | |
| Min. temperature |
34°C | -5°C | |
 Total precipitation |
17 mm | 57 mm | |
| Rainy days |
1 day | 9 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Idyllwild?
September isn’t a good month to be in Idyllwild. The average temperature of 37°C this month is uncomfortably hot for a comfortable stay.
Temperature records
With 49°C in 2020, Idyllwild reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 26°C in 2016. The extreme nighttime temperatures ranged from a lowest recorded value of 14°C to a highest value of 31°C.
Check out the climate of Idyllwild for all months and discover the best travel time
Daily Temperature in September in Idyllwild
This chart shows the average daily high and low temperatures in September for Idyllwild, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Idyllwild
The chart below shows the average daily precipitation in September for Idyllwild, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 1 day of precipitation in Idyllwild.
Daily UV index in September in Idyllwild
This chart shows the average daily UV index in September in Idyllwild, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Idyllwild over the years
This chart shows the average temperature in September in Idyllwild, measured in degrees Celsius, over the past few years.
Total precipitation in September in Idyllwild over the years
This chart shows the average precipitation in September in Idyllwild, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Idyllwild
Click on any day in September to get detailed info about the usual weather on that day in Idyllwild. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Idyllwild
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Average weather in Idyllwild by month
Click on a month below to see detailed weather info for Idyllwild. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Idyllwild for all months at once
