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
Westminster commences September with an average high-temperature of a still warm 78.3°F (25.7°C), maintaining a close resemblance to the previous month. Throughout the month of September, the average temperature dips to a refreshing 65.1°F (18.4°C) at night.Humidity
In Westminster, the average relative humidity in September is 64%.Rainfall
In Westminster, during September, the rain falls for 1.4 days and regularly aggregates up to 0.04" (1mm) of precipitation. Throughout the year, there are 25.2 rainfall days, and 1.57" (40mm) of precipitation is accumulated.Daylight
In Westminster, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:37 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index in Westminster. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What is the temperature in September in Westminster?
What is the average humidity in September in Westminster?
How much does it rain in Westminster in September?
How many hours of daylight does Westminster have in September?
When is the sunrise / sunset in September in Westminster?
How many hours of sunshine does Westminster have in September?
What are the months with the highest UV index in Westminster?
What is the UV index intensity in September in Westminster?
Average temperature in September
Westminster, CA
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in September: 65.1°F
The month with the highest average low temperature is September (65.1°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in September
Westminster, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in September
Westminster, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.2mph).
Average humidity in September
Westminster, CA
- Average humidity in September: 64%
The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).
Average rainfall in September
Westminster, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is December (0.35").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Westminster, CA
- Average rainfall days in September: 1.4 days
The month with the highest number of rainy days is March (4.6 days).
The month with the least rainy days is June (0.7 days).
Average daylight in September /
Average sunshine in September
Westminster, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Westminster, CA
- Average sunshine days in September: 27.7 days
The months with the most sunshine days are May and June (29 days).
The month with the least sunshine days is February (24.4 days).
Average UV index in September
Westminster, CA
- Average UV index in September: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Westminster, CA
- Average cloud cover in September: 9
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Westminster, 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).
Westminster, California, USA
Weather forecast for your location
2. Allow the app to use your location
