September weather forecastMokelumne Hill, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Mokelumne Hill, California, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 57°F (13.9°C).Temperature
Mokelumne Hill notes an average high-temperature of a moderately hot 85.1°F (29.5°C) in September, displaying minor variation from August. Mokelumne Hill experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a moderate 57°F (13.9°C).Heat index
September's heat index is evaluated at 84.2°F (29°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. 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 'real feel' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in September in Mokelumne Hill is 42%.Rainfall
In September, the rain falls for 3 days. Throughout September, 0.24" (6mm) of precipitation is accumulated. In Mokelumne Hill, during the entire year, the rain falls for 81.8 days and collects up to 23.39" (594mm) of precipitation.Snowfall
In Mokelumne Hill, snow does not fall in January, April through October.Daylight
In Mokelumne Hill, the average length of the day in September is 12h and 25min.On the first day of September in Mokelumne Hill, sunrise is at 6:33 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm PDT.
Sunshine
In September, the average sunshine is 11.3h.UV index
In Mokelumne Hill, California, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mokelumne Hill, CA
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (37.9°F).
Average pressure in September
Mokelumne Hill, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Mokelumne Hill, CA
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is February (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Mokelumne Hill, CA
- Average humidity in September: 42%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (40%).
Average rainfall in September
Mokelumne Hill, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is March (4.69").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Mokelumne Hill, CA
- Average rainfall days in September: 3 days
The month with the highest number of rainy days is March (14.6 days).
The month with the least rainy days is August (1.5 days).
Average snowfall in September
Mokelumne Hill, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are January, April, May, June, July, August, September and October (0").
Average snowfall days in September
Mokelumne Hill, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mokelumne Hill, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Mokelumne Hill, CA
- Average sunshine days in September: 26.5 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (15.1 days).
Average UV index in September
Mokelumne Hill, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Mokelumne Hill, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Mokelumne Hill, 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).
