September weather forecastPittsburg, CA
September
Weather in September
September, the first month of the autumn in Pittsburg, is also a moderately hot month, with an average temperature varying between 57.7°F (14.3°C) and 84.7°F (29.3°C).Temperature
The transition into September marks the average high-temperature at a moderately hot 84.7°F (29.3°C), differing minimally from August's 86.5°F (30.3°C). Throughout September, Pittsburg acknowledges a distinct difference between its daytime highs and the steady low average of 57.7°F (14.3°C).Heat index
September's heat index is evaluated at a hot 86°F (30°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.Know that the heat index computations account for shaded terrains and slight winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
September is the least humid month, with an average relative humidity of 53%.Rainfall
In Pittsburg, in September, during 2.1 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. Throughout the year, there are 66.9 rainfall days, and 10.39" (264mm) of precipitation is accumulated.Daylight
In Pittsburg, California, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 11.2h.UV index
In Pittsburg, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pittsburg, CA
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in September: 57.7°F
The months with the highest average low temperature are August and September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Pittsburg, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Pittsburg, CA
- Average wind speed in September: 6mph
The windiest months (with the highest average wind speed) are May and June (7.6mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).
Average humidity in September
Pittsburg, CA
- Average humidity in September: 53%
The months with the highest relative humidity are January and March (73%).
The month with the lowest relative humidity is September (53%).
Average rainfall in September
Pittsburg, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.01").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Pittsburg, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is August (0.9 days).
Average daylight in September /
Average sunshine in September
Pittsburg, 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 12min
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 48min).
Average sunshine days in September
Pittsburg, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in September
Pittsburg, 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
Pittsburg, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Pittsburg, 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).
