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 commencement of September involves a temperature shift, with the average high-temperature dropping from a moderately hot 81.3°F (27.4°C) in August to an agreeable 71.2°F (21.8°C). Throughout September nights, Hereford reports a steady thermal contrast from the day, with an average low-temperature of 47.3°F (8.5°C).Humidity
The average relative humidity in September in Hereford is 47%.Rainfall
In Hereford, during September, the rain falls for 6.5 days and regularly aggregates up to 0.43" (11mm) of precipitation. Throughout the year, in Hereford, there are 113.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.Snowfall
In Hereford, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:15 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:33 pm PDT.
Sunshine
In Hereford, Oregon, the average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What are the temperatures in Hereford in September?
What is the average humidity in September in Hereford?
How much does it rain in Hereford in September?
When it does not snow in Hereford?
Does it snow in Hereford in September?
How many hours of daylight does Hereford have in September?
What time are sunrise and sunset in September in Hereford?
How long on average sun shines in September in Hereford?
What is the UV index intensity in September in Hereford?
Average temperature in September
Hereford, OR
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in September: 47.3°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 (18.5°F).
Average pressure in September
Hereford, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Hereford, OR
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (5.4mph).
Average humidity in September
Hereford, OR
- Average humidity in September: 47%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Hereford, OR
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in September
Hereford, OR
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in September
Hereford, OR
- Average snowfall in September: 0"
The month with the highest snowfall is December (10.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hereford, OR
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hereford, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Hereford, OR
- Average sunshine days in September: 21.4 days
The month with the most sunshine days is July (22.7 days).
The months with the least sunshine days are February and March (11.3 days).
Average UV index in September
Hereford, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Hereford, OR
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Hereford, OR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Hereford, Oregon, USA
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