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 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
Moreno Knolls records an average high-temperature of a still hot 86.2°F (30.1°C) in September, maintaining a close correlation with August's 90.5°F (32.5°C). With a significant temperature contrast, nighttime temperatures hover around an average low of 61.7°F (16.5°C) in September.Heat index
For most parts of September, the heat index is calculated to be a hot 86°F (30°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
In Moreno Knolls, the average relative humidity in September is 45%.Rainfall
In September, the rain falls for 3.2 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. In Moreno Knolls, during the entire year, the rain falls for 54.3 days and collects up to 6.54" (166mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:22 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:33 pm PDT.
Sunshine
The average sunshine in September is 10.6h.UV index
In Moreno Knolls, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Moreno Knolls have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Moreno Knolls have in September?
What is the UV index reading in September?
Average temperature in September
Moreno Knolls, CA
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is December (59.9°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (42.4°F).
Average pressure in September
Moreno Knolls, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Moreno Knolls, CA
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in September
Moreno Knolls, CA
- Average humidity in September: 45%
The months with the highest relative humidity are February, March and May (56%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Moreno Knolls, CA
- Average rainfall in September: 0.16"
The wettest months (with the highest rainfall) are February and December (1.26").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Moreno Knolls, CA
- Average rainfall days in September: 3.2 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.3 days).
Average snowfall in September
Moreno Knolls, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Moreno Knolls, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Moreno Knolls, 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: 9h and 54min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Moreno Knolls, CA
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is June (27.4 days).
The month with the least sunshine days is February (20.9 days).
Average UV index in September
Moreno Knolls, CA
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Moreno Knolls, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Moreno Knolls, 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).
Moreno Knolls, California, USA
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