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
September reports an average high-temperature of a still moderately hot 80.4°F (26.9°C), slightly varied from August's 81.1°F (27.3°C). Mira Mesa experiences an average temperature drop to a refreshing 63.7°F (17.6°C) during September nights.Humidity
The average relative humidity in September in Mira Mesa is 64%.Rainfall
In Mira Mesa, California, in September, during 2.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Mira Mesa, California, during the entire year, the rain falls for 41.9 days and collects up to 3.35" (85mm) of precipitation.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:12 pm. On the last day of September, in Mira Mesa, sunrise is at 6:42 am and sunset at 6:33 pm PDT.
Sunshine
In September, the average sunshine is 10.3h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during September translates into these guidelines:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What is the temperature in September in Mira Mesa?
What is the average humidity in September in Mira Mesa?
How much does it rain in Mira Mesa in September?
What is the average length of the day in September in Mira Mesa?
What time are sunrise and sunset in September in Mira Mesa?
How many hours of sunshine does Mira Mesa have in September?
When is the highest UV index in Mira Mesa?
How high is the UV index in September in Mira Mesa?
Average temperature in September
Mira Mesa, CA
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (63.9°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in September
Mira Mesa, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Mira Mesa, CA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).
Average humidity in September
Mira Mesa, CA
- Average humidity in September: 64%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in September
Mira Mesa, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (0.63").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Mira Mesa, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.3 days).
Average daylight in September /
Average sunshine in September
Mira Mesa, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 6h and 48min).
Average sunshine days in September
Mira Mesa, CA
- Average sunshine days in September: 25.5 days
The month with the most sunshine days is October (26.1 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in September
Mira Mesa, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Mira Mesa, CA
- Average cloud cover in September: 10
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
Mira Mesa, 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).
Mira Mesa, California, USA
Weather forecast for your location
2. Allow the app to use your location
