September weather forecastSanta Clara, OR
September
Weather in September
September, the first month of the autumn in Santa Clara, is also a moderately hot month, with an average temperature varying between 47.8°F (8.8°C) and 73.9°F (23.3°C).Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's 81.1°F (27.3°C) to a still moderately hot 73.9°F (23.3°C). Santa Clara logs a substantial downturn to a chilly 47.8°F (8.8°C) during September nights, a considerable shift from daytime highs.Humidity
The average relative humidity in September is 73%.Rainfall
In September, the rain falls for 7.9 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. Throughout the year, there are 160.7 rainfall days, and 29.06" (738mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Santa Clara, Oregon.Daylight
In September, the average length of the day in Santa Clara is 12h and 29min.On the first day of September, sunrise is at 6:36 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm PDT.
Sunshine
In Santa Clara, the average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Heed the precautions - Suggestions to avoid sunburn are made. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Santa Clara, OR
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 47.8°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in September
Santa Clara, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Santa Clara, OR
- Average wind speed in September: 3.7mph
The windiest months (with the highest average wind speed) are January, February, March and December (4.5mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity in September
Santa Clara, OR
- Average humidity in September: 73%
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Santa Clara, OR
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is December (4.45").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Santa Clara, OR
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is March (19.8 days).
The months with the least rainy days are July and August (3.8 days).
Average snowfall in September
Santa Clara, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Santa Clara, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Santa Clara, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Santa Clara, OR
- Average sunshine days in September: 20.7 days
The months with the most sunshine days are July and August (25.3 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Santa Clara, OR
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Santa Clara, OR
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Santa Clara, OR
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).
