September weather forecastJunction City, CA
September
Weather in September
September, the first month of the autumn in Junction City, is still a warm month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 77.9°F (25.5°C).Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a still warm 77.9°F (25.5°C) from August's moderately hot 84.6°F (29.2°C). Junction City experiences a consistent, yet significant, drop from daily highs to a low-temperature of 46.2°F (7.9°C) throughout September.Humidity
In Junction City, the average relative humidity in September is 57%.Rainfall
In Junction City, in September, it is raining for 3.6 days, with typically 0.47" (12mm) of accumulated precipitation. In Junction City, during the entire year, the rain falls for 119.2 days and collects up to 33.35" (847mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Junction City is 12h and 27min.On the first day of September, sunrise is at 6:40 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:55 pm PDT.
Sunshine
In Junction City, California, the average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average UV index of 4 in September transforms into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Junction City, CA
- Average high temperature in September: 77.9°F
The warmest months (with the highest average high temperature) are July and August (84.6°F).
The month with the lowest average high temperature is December (45°F).
- Average low temperature in September: 46.2°F
The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is December (30°F).
Average pressure in September
Junction City, CA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in September
Junction City, CA
- Average wind speed in September: 3.7mph
The windiest months (with the highest average wind speed) are March and April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in September
Junction City, CA
- Average humidity in September: 57%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Junction City, CA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is December (6.14").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in September
Junction City, CA
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in September
Junction City, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (8.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Junction City, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 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
Junction City, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Junction City, CA
- Average sunshine days in September: 24.8 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index in September
Junction City, CA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Junction City, CA
- Average cloud cover in September: 16
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
Junction City, CA
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are March and December (4mi).
