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 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
As September takes its course, Monterey Park's average high-temperature registers at a moderately hot 84.4°F (29.1°C), closely aligning with the preceding month. During the nights in September, Monterey Park observes an average low-temperature of 64.4°F (18°C).Heat index
Throughout September, the heat index is calculated to be a tropical 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
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. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in September is 52%.Rainfall
In Monterey Park, in September, it is raining for 1.6 days, with typically 0.04" (1mm) of accumulated precipitation. In Monterey Park, during the entire year, the rain falls for 29.9 days and collects up to 2.17" (55mm) of precipitation.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September in Monterey Park, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:37 pm PDT.
Sunshine
In Monterey Park, California, the average sunshine in September is 10.8h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Monterey Park in September?
What is the average humidity in September in Monterey Park?
How much does it rain in Monterey Park in September?
What is the average length of the day in September in Monterey Park?
What time are sunrise and sunset in September in Monterey Park?
How many hours of sunshine does Monterey Park have in September?
What is the month with the highest UV index in Monterey Park?
What is the UV index reading in September in Monterey Park?
Average temperature in September
Monterey Park, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.6°F).
Average pressure in September
Monterey Park, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Monterey Park, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.5mph).
Average humidity in September
Monterey Park, CA
- Average humidity in September: 52%
The month with the highest relative humidity is June (60%).
The month with the lowest relative humidity is November (47%).
Average rainfall in September
Monterey Park, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is February (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Monterey Park, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (6.2 days).
The month with the least rainy days is June (0.6 days).
Average daylight in September /
Average sunshine in September
Monterey Park, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in September
Monterey Park, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (23.4 days).
Average UV index in September
Monterey Park, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Monterey Park, CA
- Average cloud cover in September: 7
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Monterey Park, 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).
Monterey Park, California, USA
Weather forecast for your location
2. Allow the app to use your location