Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Madison's shift into September is marked by a subtle change to a still hot 88.7°F (31.5°C) from August's 93.2°F (34°C) in temperature. During September, the nighttime temperature in Madison presents a clear descent from the daily peaks, falling to an average of 59°F (15°C).Heat index
For September, the heat index is estimated at a hot 89.6°F (32°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Be informed that the heat index values are oriented around shady conditions and gentle breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
The least humid month is September, with an average relative humidity of 43%.Rainfall
In Madison, in September, it is raining for 1.8 days, with typically 0.08" (2mm) of accumulated precipitation. In Madison, during the entire year, the rain falls for 70.7 days and collects up to 12.52" (318mm) of precipitation.Snowfall
January through November are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of September, in Madison, sunrise is at 7:03 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September in Madison is 11.2h.UV index
The average daily maximum UV index in September in Madison is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
How hot is September in Madison?
What is the least humid month in Madison?
What is the average humidity in September in Madison?
How many days does it rain in September in Madison?
When it does not snow in Madison?
What is the average length of the day in September in Madison?
What time are sunrise and sunset in September in Madison?
How long on average sun shines in September in Madison?
What is the UV index intensity in September in Madison?
Average temperature in September
Madison, CA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in September: 59°F
The months with the highest average low temperature are July and August (59.2°F).
The coldest months (with the lowest average low temperature) are January and December (41.5°F).
Average pressure in September
Madison, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Madison, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest month (with the lowest average wind speed) is September (5mph).
Average humidity in September
Madison, CA
- Average humidity in September: 43%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (43%).
Average rainfall in September
Madison, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.52").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Madison, CA
- Average rainfall days in September: 1.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (0.8 days).
Average snowfall days in September
Madison, 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).
Average daylight in September /
Average sunshine in September
Madison, CA
- Average daylight in September: 12h and 2min
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 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Madison, CA
- Average sunshine days in September: 28 days
The months with the most sunshine days are July and August (29.3 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in September
Madison, 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).
Average cloud cover in September
Madison, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Madison, 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).
Madison, California, USA
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