Temperatures in September
It's hot in September in Monterey with an average temperature of 33°C. Temperatures this month range from a low of 29°C to a high of 35°C. At night, you can expect temperatures between 16°C and 23°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Monterey in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Monterey with hot temperatures, averaging around 35°C during the day and nights close to 23°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature drops to around 33°C, with nights close to 20°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in Monterey will be around 32°C, with nights close to 20°C. A shower might show up, but overall the weather will be dry and sunny.
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Precipitation in September
In September, there is an average of 78 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
The average precipitation chance is 26% per day this month.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Monterey. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Monterey in September |
London | ||
|---|---|---|---|
 Average Temperature |
33°C | 20°C | |
 High Temp |
35°C | 22°C | |
| Low Temp |
29°C | 17°C | |
 Total Precipitation |
78 mm | 44 mm | |
| Rainy Days |
8 days | 8 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Monterey?
September is a great month to be in Monterey for sunny weather. You’ll get high temperatures and not too much rain this month.
The hurricane season in Monterey runs from June to November.
Temperature records for Monterey in September
With 40°C, Monterey hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 22°C in 2020. The extreme night temperatures ranged from a low of 8°C to a high of 26°C.
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Daily Temperature in September in Monterey
This chart shows the average daily temperatures, both day and night, for each day in September in Monterey, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Monterey
The chart below shows the average daily precipitation in September for Monterey, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 8 days of rain in Monterey.
Daily UV Index in September in Monterey
This chart shows the average daily UV index in September in Monterey, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Monterey Over the Years
This chart shows the average temperature in September in Monterey, measured in degrees Celsius, over the past years.
Total Precipitation in September in Monterey Over the Years
This chart shows the average precipitation in September in Monterey, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Monterey
Click on a specific day in September for detailed info on the typical weather on that day in Monterey. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Monterey
Have you been to Monterey in September?
Share your weather experience in September in Monterey.
Average Weather in Monterey by Month
Click on a month below to see detailed weather info for Monterey. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
