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 sea temperature 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
September
Weather in September
Temperature
Monterey's warmest month, September, registers temperatures that range from a high of 72.5°F (22.5°C) to a low of 55.2°F (12.9°C).Humidity
The average relative humidity in September in Monterey, California, is 72%.Rainfall
In Monterey, in September, during 2.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, in Monterey, there are 73.6 rainfall days, and 11.77" (299mm) of precipitation is accumulated.Ocean temperature
The months with the warmest seawater in Monterey, California, are August and September, with an average ocean temperature of 58.1°F (14.5°C).Note: Dipping into 58.1°F (14.5°C) below 50°F (10°C) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 55.4°F (13°C) can be jarring.
Daylight
In Monterey, the average length of the day in September is 12h and 24min.On the first day of September in Monterey, sunrise is at 6:39 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm PDT.
Sunshine
In Monterey, the average sunshine in September is 11.1h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index in Monterey. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Take precautions - Protection against sun damage is advised. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Monterey?
What are the temperatures in Monterey in September?
What is the average humidity in September in Monterey?
How much does it rain in Monterey in September?
When is the ocean warmest in Monterey?
How cold is the water in September in Monterey?
What is the average length of the day in September in Monterey?
What time are sunrise and sunset in September in Monterey?
How long on average sun shines in September in Monterey?
What is the month with the highest UV index in Monterey?
What is the UV index reading in September in Monterey?
Average temperature in September
Monterey, CA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in September: 55.2°F
The months with the highest average low temperature are August and September (55.2°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in September
Monterey, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in September
Monterey, CA
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Monterey, CA
- Average humidity in September: 72%
The months with the highest relative humidity are March and May (76%).
The month with the lowest relative humidity is November (68%).
Average rainfall in September
Monterey, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (2.4").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Monterey, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (1.1 days).
Average sea temperature in September
Monterey, CA
- Average sea temperature in September: 58.1°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in September /
Average sunshine in September
Monterey, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Monterey, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in September
Monterey, CA
- Average UV index in September: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Monterey, CA
- Average cloud cover in September: 12
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Monterey, 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).