September weather forecast
Hereford, OR

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Weather in September

September, the first month of the autumn in Hereford, is still a pleasant month, with an average temperature ranging between max 71.2°F (21.8°C) and min 47.3°F (8.5°C).

Temperature

The arrival of September corresponds with a shift in temperature, down from a moderately hot 81.3°F (27.4°C) in August to a pleasant 71.2°F (21.8°C). Hereford registers a substantial downturn from daytime peaks throughout September nights, with an average low-temperature of 47.3°F (8.5°C).

Humidity

In Hereford, the average relative humidity in September is 47%.

Rainfall

In Hereford, Oregon, in September, during 6.5 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 113.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:15 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:33 pm PDT.

Sunshine

In Hereford, the average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.

Frequently asked questions

What is the temperature in September?

The average high-temperature and low-temperature during September are 71.2°F (21.8°C) and 47.3°F (8.5°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 80.6°F (27°C).

What is the average humidity in September?

In September, the average relative humidity is 47%.

How much does it rain in September?

In Hereford, during September, the rain falls for 6.5 days and regularly aggregates up to 0.43" (11mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

In Hereford, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Hereford have in September?

In Hereford, the average day length in September is 12h and 30min.

When are sunrise and sunset in September?

In September, on the first day of the month, 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.

How many hours of sunshine does Hereford have in September?

The average sunshine duration in September in Hereford is 10.7h.

What is the UV index intensity in September in Hereford?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Hereford, OR

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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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