Climate and monthly weather forecastCascadia, OR
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Cascadia, Oregon, with an average temperature varying between 46.9°F (8.3°C) and 34.3°F (1.3°C). Cascadia's shift into January sets the average high-temperature at a still chilly 46.9°F (8.3°C), a figure that deviates only slightly from December's 44.4°F (6.9°C). Weather in January »Weather in February
February, the last month of the winter in Cascadia, is another chilly month, with an average temperature fluctuating between 47.3°F (8.5°C) and 33.8°F (1°C). The start of February marks an average high-temperature of a still chilly 47.3°F (8.5°C), hardly distinguishable from the conditions in January. Weather in February »Weather in March
The first month of the spring, March, is a cool month in Cascadia, Oregon, with an average temperature fluctuating between 50.2°F (10.1°C) and 35.1°F (1.7°C). March welcomes an average high-temperature of a fresh 50.2°F (10.1°C), not much different from the preceding month. Weather in March »Weather in April
April is a refreshing spring month in Cascadia, Oregon, with an average temperature fluctuating between 55.9°F (13.3°C) and 36.9°F (2.7°C). Cascadia's transition into April brings a slight rise in the average high-temperature, moving from a cool 50.2°F (10.1°C) in March to a refreshing 55.9°F (13.3°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Cascadia, Oregon, with an average temperature varying between 63.9°F (17.7°C) and 40.6°F (4.8°C). The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a refreshing 55.9°F (13.3°C) in April to a comfortable 63.9°F (17.7°C). Weather in May »Weather in June
June, the first month of the summer in Cascadia, is a pleasant month, with an average temperature fluctuating between 44.2°F (6.8°C) and 69.4°F (20.8°C). The shift into June is characterized by a subtle rise in the average high-temperature, transitioning from May's refreshing 63.9°F (17.7°C) to a pleasant 69.4°F (20.8°C). Weather in June »Weather in July
July in Cascadia, Oregon, is a moderately hot summer month, with an average temperature varying between 48°F (8.9°C) and 78.4°F (25.8°C). Noticing a change, the average high-temperature during July moves from June's agreeable 69.4°F (20.8°C) to a moderately hot 78.4°F (25.8°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Cascadia, Oregon, with an average temperature fluctuating between 49.8°F (9.9°C) and 79.5°F (26.4°C). August, recognised by an average high temperature of 79.5°F (26.4°C) and a low of 49.8°F (9.9°C), is Cascadia's warmest month. Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Cascadia, Oregon, with an average temperature fluctuating between 47.3°F (8.5°C) and 72.3°F (22.4°C). September's onset brings a negligible change in high-temperatures, falling from a warm 79.5°F (26.4°C) in August to an agreeable 72.3°F (22.4°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Cascadia, Oregon, with an average temperature varying between 61.5°F (16.4°C) and 42.8°F (6°C). The transition into October indicates a reduction in the average high-temperature, down to a refreshing 61.5°F (16.4°C) from September's agreeable 72.3°F (22.4°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Cascadia, Oregon, with an average temperature fluctuating between 38.1°F (3.4°C) and 50.7°F (10.4°C). The shift from October to November corresponds with a decrease in the average high-temperature, down to a cool 50.7°F (10.4°C) from a comfortable 61.5°F (16.4°C). Weather in November »Weather in December
December, the first month of the winter in Cascadia, is still a chilly month, with temperature in the range of an average high of 44.4°F (6.9°C) and an average low of 32.9°F (0.5°C). December is the coldest month, with the temperature often reaching an average high of 44.4°F (6.9°C) and an average low of 32.9°F (0.5°C). Weather in December »Updated: Jun 4, 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 Cascadia, during the entire year, the rain falls for 167.6 days and collects up to 36.54" (928mm) of precipitation.
Months with snowfall are January through April, November and December.
Throughout the year, there are 7.9 snowfall days, and 7.76" (197mm) of snow is accumulated.
The months with the highest humidity are February, March and December, with an average relative humidity of 86%.
February is the month with the most snowfall. Snow falls for 3.4 days and accumulates 3.7" (94mm) of snow.
February has the least sunshine of the year, with an average of 4.1h 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.
In Cascadia, snow does not fall in May through October.
The month with the longest days is June, with an average of 15h and 30min of daylight.
The month with the least rainfall is July, when the rain falls for 4.1 days and typically collects 0.24" (6mm) of precipitation.
With an average maximum UV index of 6, July is the month with the highest UV index.
Cascadia's temperatures peak on average in August, reaching 79.5°F (26.4°C) at their highest and 49.8°F (9.9°C) at their lowest.
With an average relative humidity of 66%, August is the least humid month.
The month with the most sunshine is August, with an average of 11.3h of sunshine.
With an average maximum UV index of 1, November is the month with the lowest UV index.
Cascadia's coldest temperatures are experienced in December, with average high temperatures of 44.4°F (6.9°C) and lows of 32.9°F (0.5°C).
December is the month with the most rainfall. Rain falls for 18.9 days and accumulates 5.47" (139mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 54min of daylight.
Average temperature
Cascadia, OR
The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure
Cascadia, OR
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Cascadia, OR
- Average wind speed in January:
5.1mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.9mph - Average wind speed in April:
4.5mph - Average wind speed in May:
4.1mph - Average wind speed in June:
4mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.7mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.3mph - Average wind speed in November:
5mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity
Cascadia, OR
The months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall
Cascadia, OR
- Average rainfall in January:
4.92" - Average rainfall in February:
4.45" - Average rainfall in March:
4.49" - Average rainfall in April:
4.06" - Average rainfall in May:
2.17" - Average rainfall in June:
1.5"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.31" - Average rainfall in September:
1.61" - Average rainfall in October:
3.23" - Average rainfall in November:
4.09" - Average rainfall in December:
5.47"
The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Cascadia, OR
- Average rainfall days in January:
17.4 days - Average rainfall days in February:
17.8 days - Average rainfall days in March:
21.1 days - Average rainfall days in April:
18.7 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
10.7 days
- Average rainfall days in July:
4.1 days - Average rainfall days in August:
4.2 days - Average rainfall days in September:
9 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
17.8 days - Average rainfall days in December:
18.9 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).
Average snowfall
Cascadia, OR
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Cascadia, OR
- Average snowfall days in January:
1.5 days - Average snowfall days in February:
3.4 days - Average snowfall days in March:
1.6 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in December:
1 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Cascadia, OR
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
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 January:
4h and 18min - Average sunshine in February:
4h and 6min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
11h and 12min - Average sunshine in August:
11h and 18min - Average sunshine in September:
9h and 30min - Average sunshine in October:
5h and 36min - Average sunshine in November:
4h and 48min - Average sunshine in December:
4h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days
Cascadia, OR
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
8.6 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
15.6 days - Average sunshine days in June:
17.4 days
- Average sunshine days in July:
25.7 days - Average sunshine days in August:
24.8 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
11 days - Average sunshine days in December:
11 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).
Average UV index
Cascadia, OR
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover
Cascadia, OR
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility
Cascadia, OR
The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).
