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 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
Holt marks the onset of September with an average high-temperature of a still tropical 88.7°F (31.5°C), subtly divergent from August's 93°F (33.9°C). In Holt, September nights witness a remarkable decline from the day's zenith to a mild 58.8°F (14.9°C).Heat index
September's heat index is computed to be a tropical 91.4°F (33°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity in Holt is 46%.Rainfall
January through July, September through December are months with rainfall in Holt, California. September is the first month it rains in Holt. Throughout September, in the average 1.6 rainfall days, it receives 0.08" (2mm) of precipitation. In Holt, during the entire year, the rain falls for 64.2 days and collects up to 11.34" (288mm) of precipitation.Snowfall
January through November are months without snowfall.Daylight
The average length of the day in September in Holt is 12h and 25min.On the first day of September in Holt, sunrise is at 6:36 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm PDT.
Sunshine
In Holt, the average sunshine in September is 11.4h.UV index
In Holt, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard 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:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
How hot is it in Holt in September?
What is the average humidity in September in Holt?
When does it start to rain in Holt?
When it does not snow in Holt?
How many hours of daylight does Holt have in September?
When is the sunrise / sunset in September in Holt?
How long on average sun shines in September in Holt?
What is the UV index reading in September in Holt?
Average temperature in September
Holt, CA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (41.2°F).
Average pressure in September
Holt, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Holt, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in September
Holt, CA
- Average humidity in September: 46%
The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is July (44%).
Average rainfall in September
Holt, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.13").
The driest month (with the least rainfall) is August (0").
Average rainfall days in September
Holt, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (12 days).
The month with the least rainy days is August (0.7 days).
Average snowfall days in September
Holt, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Holt, CA
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Holt, CA
- Average sunshine days in September: 28 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (17.8 days).
Average UV index in September
Holt, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Holt, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Holt, 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).
Holt, California, USA
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