September weather forecastMorgan Hill, CA
September
Weather in September
September, the first month of the autumn in Morgan Hill, is still a warm month, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 54.5°F (12.5°C).Temperature
September's arrival shows an average high-temperature of a still moderately hot 82.8°F (28.2°C), hardly different from the previous month. Throughout September nights, Morgan Hill reports a steady thermal contrast from the day, with an average low-temperature of 54.5°F (12.5°C).Heat index
September's mean heat index is computed to be 84.2°F (29°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Data suggests that the heat index is set for environments in shade and with a light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
In Morgan Hill, the average relative humidity in September is 57%.Rainfall
In Morgan Hill, California, in September, during 2.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Morgan Hill, during the entire year, the rain falls for 68.2 days and collects up to 10.79" (274mm) of precipitation.Daylight
In Morgan Hill, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:38 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:50 pm PDT.
Sunshine
The average sunshine in September is 11.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Morgan Hill, CA
- Average high temperature in September: 82.8°F
The warmest months (with the highest average high temperature) are July and August (85.5°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is August (55°F).
The coldest months (with the lowest average low temperature) are February and December (40.6°F).
Average pressure in September
Morgan Hill, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Morgan Hill, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is May (5.4mph).
The calmest months (with the lowest average wind speed) are January and November (4mph).
Average humidity in September
Morgan Hill, CA
- Average humidity in September: 57%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (56%).
Average rainfall in September
Morgan Hill, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is January (1.97").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Morgan Hill, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Morgan Hill, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Morgan Hill, CA
- Average sunshine days in September: 27 days
The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Morgan Hill, 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
Morgan Hill, CA
- Average cloud cover in September: 8
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
Morgan Hill, 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).
