September weather forecastTillamook, OR
September
Weather in September
Tillamook in September features the beginning of autumn with a descent into cooler conditions. Rainfall notably increases from 0.28" (7mm) in August to 0.71" (18mm), indicating the onset of the wet season. Chillier temperatures and shorter daylight hours mark October's weather, following the path led by September. Despite the onset of cooler weather, sunlight bathes Tillamook generously, marking this month as the beginning of stunning autumnal hues.Temperature
Tillamook marks the onset of September with an average high-temperature of a refreshing 65.1°F (18.4°C), subtly divergent from August's 68.4°F (20.2°C). In the month of September, Tillamook experiences an average low-temperature of 52.3°F (11.3°C).Humidity
The average relative humidity in September is 81%.Rainfall
In September, the rain falls for 6.8 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. In Tillamook, during the entire year, the rain falls for 137.4 days and collects up to 15" (381mm) of precipitation.Snowfall
In Tillamook, Oregon, snow does not fall in April through November.Daylight
The average length of the day in September in Tillamook is 12h and 31min.On the first day of September, sunrise is at 6:37 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:56 pm PDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index in Tillamook, Oregon, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tillamook, OR
- Average high temperature in September: 65.1°F
The warmest month (with the highest average high temperature) is August (68.4°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).
Average pressure in September
Tillamook, OR
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).
Average wind speed in September
Tillamook, OR
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Tillamook, OR
- Average humidity in September: 81%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is May (80%).
Average rainfall in September
Tillamook, OR
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is December (2.68").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Tillamook, OR
- Average rainfall days in September: 6.8 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (4.3 days).
Average snowfall in September
Tillamook, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Tillamook, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Tillamook, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Tillamook, OR
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is March (11.4 days).
Average UV index in September
Tillamook, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Tillamook, OR
- Average cloud cover in September: 34
The months with the most cloud cover are February and March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Tillamook, OR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
