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 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
San Francisco in September witnesses an average high-temperature of a still moderately hot 26.8°C (80.2°F), indicating a slight variation from August's 27.1°C (80.8°F). Throughout September, the average low-temperature in San Francisco dips to an enjoyable 18.1°C (64.6°F).Humidity
The average relative humidity in September is 88%.Rainfall
In San Francisco, in September, it is raining for 29.4 days, with typically 230mm (9.06") of accumulated precipitation. In San Francisco, during the entire year, the rain falls for 309.8 days and collects up to 1689mm (66.5") of precipitation.Daylight
The average length of the day in September is 12h and 13min.On the first day of September, sunrise is at 05:35 and sunset at 18:00. On the last day of the month, sunrise is at 05:37 and sunset at 17:37 CST.
Sunshine
In September, the average sunshine in San Francisco is 7.2h.UV index
The months with the lowest UV index in San Francisco are January, February, August through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What are September temperatures in San Francisco?
What is the average humidity in September in San Francisco?
How much does it rain in San Francisco in September?
What is the average length of the day in September in San Francisco?
When are sunrise and sunset in September in San Francisco?
How long on average sun shines in September in San Francisco?
What are the months with the lowest UV index in San Francisco?
What is the UV index intensity in September in San Francisco?
Average temperature in September
San Francisco, Honduras
- Average high temperature in September: 26.8°C
The warmest month (with the highest average high temperature) is April (29.3°C).
The month with the lowest average high temperature is January (23°C).
- Average low temperature in September: 18.1°C
The month with the highest average low temperature is May (19°C).
The coldest month (with the lowest average low temperature) is January (14.7°C).
Average pressure in September
San Francisco, Honduras
- Average pressure in September: 1012.1mbar
The month with the highest atmospheric pressure is January (1016.2mbar).
The month with the lowest atmospheric pressure is September (1012.1mbar).
Average wind speed in September
San Francisco, Honduras
- Average wind speed in September: 4.7km/h
The windiest month (with the highest average wind speed) is March (6.2km/h).
The calmest month (with the lowest average wind speed) is September (4.7km/h).
Average humidity in September
San Francisco, Honduras
- Average humidity in September: 88%
The months with the highest relative humidity are October and November (90%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
San Francisco, Honduras
- Average rainfall in September: 230mm
The wettest months (with the highest rainfall) are May and June (248mm).
The driest month (with the least rainfall) is February (48mm).
Average rainfall days in September
San Francisco, Honduras
- Average rainfall days in September: 29.4 days
The month with the highest number of rainy days is August (30.1 days).
The month with the least rainy days is February (18.8 days).
Average daylight in September /
Average sunshine in September
San Francisco, Honduras
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is April (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 5h and 6min).
Average sunshine days in September
San Francisco, Honduras
- Average sunshine days in September: 0.2 days
The month with the most sunshine days is March (7.5 days).
The month with the least sunshine days is September (0.2 days).
Average UV index in September
San Francisco, Honduras
- Average UV index in September: 5
The months with the highest UV index are March, April, May, June and July (UV index 6).
The months with the lowest UV index are January, February, August, September, October, November and December (UV index 5).
Average cloud cover in September
San Francisco, Honduras
- Average cloud cover in September: 59
The month with the most cloud cover is November (Cloud cover 75).
The month with the least cloud cover is April (Cloud cover 36).
Average visibility in September
San Francisco, Honduras
- Average visibility in September: 6km
The months with the highest visibility are April and May (8km).
The months with the lowest visibility are November and December (5km).
San Francisco, Honduras
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