Climate and monthly weather forecastDayton, OR
Climate and monthly weather forecast
Weather in January
January, like December, is another chilly winter month in Dayton, Oregon, with an average temperature fluctuating between 46°F (7.8°C) and 35.1°F (1.7°C). A minimal variation is noted in Dayton's average high-temperature at the onset of January, reaching a still frosty 46°F (7.8°C) from December's 44.1°F (6.7°C). Weather in January »Weather in February
The last month of the winter, February, is also a frosty month in Dayton, Oregon, with an average temperature varying between 35.1°F (1.7°C) and 47.8°F (8.8°C). At the onset of February, Dayton records an average high-temperature of a still chilly 47.8°F (8.8°C), showing little deviation from the preceding month. Weather in February »Weather in March
March, the first month of the spring in Dayton, is a cool month, with an average temperature fluctuating between 37°F (2.8°C) and 51.6°F (10.9°C). The advent of March observes an average high-temperature of a fresh 51.6°F (10.9°C), nearly identical to February's 47.8°F (8.8°C). Weather in March »Weather in April
April is a moderate spring month in Dayton, Oregon, with an average temperature ranging between min 38.8°F (3.8°C) and max 57.7°F (14.3°C). The arrival of April brings a soft temperature shift, with the average high-temperature nudging from a fresh 51.6°F (10.9°C) in March to a mild 57.7°F (14.3°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Dayton, Oregon, with temperature in the range of an average high of 66°F (18.9°C) and an average low of 43.3°F (6.3°C). Dayton in May observes a minor temperature shift, with average high-temperatures adjusting from a moderate 57.7°F (14.3°C) in April to an enjoyable 66°F (18.9°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Dayton, Oregon, with an average temperature fluctuating between 47.8°F (8.8°C) and 71.2°F (21.8°C). The arrival of June records an average high-temperature of a pleasant 71.2°F (21.8°C), closely related to the 66°F (18.9°C) observed in May. Weather in June »Weather in July
July is a warm summer month in Dayton, Oregon, with an average temperature ranging between min 52.3°F (11.3°C) and max 79.2°F (26.2°C). A slight uplift in the average high-temperature marks July, adjusting from June's pleasant 71.2°F (21.8°C) to a moderately hot 79.2°F (26.2°C). Weather in July »Weather in August
August, the last month of the summer in Dayton, is also a moderately hot month, with an average temperature fluctuating between 54.3°F (12.4°C) and 81.1°F (27.3°C). August, known for its average high temperature of 81.1°F (27.3°C) and an average low temperature of 54.3°F (12.4°C), is the warmest month. The heat index value during August is evaluated at 84.2°F (29°C). Weather in August »Weather in September
September, the first month of the autumn in Dayton, is also a moderately hot month, with an average temperature varying between 73.4°F (23°C) and 50.5°F (10.3°C). Dayton's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's 81.1°F (27.3°C) to a still moderately hot 73.4°F (23°C). Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Dayton, Oregon, with an average temperature ranging between max 61.2°F (16.2°C) and min 45°F (7.2°C). Dayton's transition into October involves a shift in temperature, receding from a warm 73.4°F (23°C) in September to an enjoyable 61.2°F (16.2°C). Weather in October »Weather in November
November, the last month of the autumn in Dayton, is also a fresh month, with temperature in the range of an average high of 50.5°F (10.3°C) and an average low of 39.4°F (4.1°C). Dayton's November weather features a mild decline in high-temperatures, reducing from a refreshing 61.2°F (16.2°C) in October to a cool 50.5°F (10.3°C). Weather in November »Weather in December
December, the first month of the winter in Dayton, is still a chilly month, with an average temperature ranging between min 34.3°F (1.3°C) and max 44.1°F (6.7°C). December is the month that records the lowest temperatures, with averages ranging from a high of 44.1°F (6.7°C) to a low of 34.3°F (1.3°C). Weather in December »Updated: Jul 1, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Dayton, during the entire year, the rain falls for 172.2 days and collects up to 28.9" (734mm) of precipitation.
Months with snowfall are January through March, November and December.
Throughout the year, in Dayton, there are 5.3 snowfall days, and 3.19" (81mm) of snow is accumulated.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February and December, with an average relative humidity of 87%.
February is the month with the most snowfall. Snow falls for 2 days and accumulates 1.38" (35mm) of snow.
February has the least sunshine of the year, with an average of 3.9h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
April through October are months without snowfall.
With an average of 15h and 36min of daylight, June has the longest days of the year.
The months with the least rainfall are July and August Rain falls for 4.8 days and accumulates 0.35" (9mm) of rain.
July is the month with the highest UV index, with an average maximum UV index of 6.
The warmest period is August, when temperatures fluctuate between an average high of 81.1°F (27.3°C) and a low of 54.3°F (12.4°C).
August is the least humid month, with an average relative humidity of 67%.
August has the most sunshine of the year, with an average of 10.8h of sunshine.
Dayton's coldest month, December, registers temperatures that range from a high of 44.1°F (6.7°C) to a low of 34.3°F (1.3°C).
December is the month with the most rainfall. Rain falls for 19.3 days and accumulates 4.49" (114mm) of precipitation.
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Dayton, OR
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (44.1°F).
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure
Dayton, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.05"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Dayton, OR
- Average wind speed in January:
5.1mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5.2mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4.2mph - Average wind speed in August:
4mph - Average wind speed in September:
4.1mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.1mph - Average wind speed in December:
4.8mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity
Dayton, OR
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (67%).
Average rainfall
Dayton, OR
- Average rainfall in January:
4.41" - Average rainfall in February:
3.11" - Average rainfall in March:
3.43" - Average rainfall in April:
2.6" - Average rainfall in May:
1.65" - Average rainfall in June:
1.14"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.35" - Average rainfall in September:
1.42" - Average rainfall in October:
2.8" - Average rainfall in November:
3.15" - Average rainfall in December:
4.49"
The wettest month (with the highest rainfall) is December (4.49").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days
Dayton, OR
- Average rainfall days in January:
18.2 days - Average rainfall days in February:
17.3 days - Average rainfall days in March:
19.8 days - Average rainfall days in April:
19.2 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
11.3 days
- Average rainfall days in July:
4.8 days - Average rainfall days in August:
4.6 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
15 days - Average rainfall days in November:
18.8 days - Average rainfall days in December:
19.3 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.6 days).
Average snowfall
Dayton, OR
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Dayton, OR
- Average snowfall days in January:
1 days - Average snowfall days in February:
2 days - Average snowfall days in March:
1.3 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Dayton, OR
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
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 January:
4h and 0min - Average sunshine in February:
3h and 54min - Average sunshine in March:
5h and 30min - Average sunshine in April:
7h and 6min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 36min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days
Dayton, OR
- Average sunshine days in January:
10.6 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
9.3 days - Average sunshine days in April:
8.7 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
16.8 days
- Average sunshine days in July:
24.2 days - Average sunshine days in August:
24.1 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
10.1 days - Average sunshine days in December:
9.7 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is February (8.4 days).
Average UV index
Dayton, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Dayton, OR
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility
Dayton, OR
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).
