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 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
The transition into September involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 73.4°F (23°C) in August to a comfortable 66.4°F (19.1°C). September sees the temperature falling to a mean low of 45°F (7.2°C).Humidity
In Monte Cristo, the average relative humidity in September is 77%.Rainfall
In Monte Cristo, during September, the rain falls for 12.8 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, in Monte Cristo, there are 200.6 rainfall days, and 51.65" (1312mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 33min.On the first day of September, sunrise is at 6:24 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:45 pm PDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September in Monte Cristo is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Monte Cristo in September?
What is the average humidity in September in Monte Cristo?
How many days does it rain in September in Monte Cristo?
When it does not snow in Monte Cristo?
What is the average length of the day in September in Monte Cristo?
What time are sunrise and sunset in September in Monte Cristo?
How many hours of sunshine does Monte Cristo have in September?
What is the UV index intensity in September in Monte Cristo?
Average temperature in September
Monte Cristo, WA
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is August (48°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in September
Monte Cristo, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
Monte Cristo, WA
- Average wind speed in September: 3.3mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in September
Monte Cristo, WA
- Average humidity in September: 77%
The months with the highest relative humidity are January, February and March (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Monte Cristo, WA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is January (7.8").
The driest month (with the least rainfall) is August (0.79").
Average rainfall days in September
Monte Cristo, WA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is March (22.3 days).
The month with the least rainy days is August (7.9 days).
Average snowfall in September
Monte Cristo, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Monte Cristo, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Monte Cristo, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Monte Cristo, WA
- Average sunshine days in September: 15 days
The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is March (7 days).
Average UV index in September
Monte Cristo, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Monte Cristo, WA
- Average cloud cover in September: 41
The months with the most cloud cover are March and December (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Monte Cristo, WA
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Monte Cristo, Washington, USA
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