September weather forecastCajon Junction, CA
September
Weather in September
September, the first month of the autumn in Cajon Junction, is still a warm month, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 62.1°F (16.7°C).Temperature
August's transformation into September witnesses an average high-temperature of a moderately hot 85.1°F (29.5°C), noting a minor change from the preceding month. Cajon Junction, after hot September days, encounters a marked drop to an average nighttime temperature of 62.1°F (16.7°C).Humidity
The average relative humidity in September in Cajon Junction is 37%.Rainfall
In Cajon Junction, in September, during 1.9 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, there are 32.3 rainfall days, and 2.52" (64mm) of precipitation is accumulated.Snowfall
In Cajon Junction, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:15 pm. On the last day of September, in Cajon Junction, sunrise is at 6:44 am and sunset at 6:34 pm PDT.
Sunshine
The average sunshine in September in Cajon Junction is 10.8h.UV index
The average daily maximum UV index in September in Cajon Junction is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the UV index of 5 transforms into the following advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cajon Junction, CA
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in September: 62.1°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is December (39.4°F).
Average pressure in September
Cajon Junction, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Cajon Junction, CA
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is September (5.8mph).
Average humidity in September
Cajon Junction, CA
- Average humidity in September: 37%
The month with the highest relative humidity is December (53%).
The month with the lowest relative humidity is August (33%).
Average rainfall in September
Cajon Junction, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Cajon Junction, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is March (4.9 days).
The month with the least rainy days is June (0.7 days).
Average snowfall in September
Cajon Junction, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Cajon Junction, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 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
Cajon Junction, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in September
Cajon Junction, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.6 days).
Average UV index in September
Cajon Junction, CA
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Cajon Junction, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Cajon Junction, 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).
