Climate and monthly weather forecastCornelius, OR
Climate and monthly weather forecast
Weather in January
January, the same as December, in Cornelius, Oregon, is a frosty winter month, with an average temperature varying between 34.7°F (1.5°C) and 45.3°F (7.4°C). Upon the beginning of January, Cornelius's high-temperatures register at a still chilly 45.3°F (7.4°C), closely mirroring the preceding month. Weather in January »Weather in February
February, the last month of the winter in Cornelius, is another chilly month, with an average temperature fluctuating between 35.2°F (1.8°C) and 47.3°F (8.5°C). Cornelius notes an average high-temperature of a still frosty 47.3°F (8.5°C) in February, displaying minor variation from January. Weather in February »Weather in March
March, the first month of the spring in Cornelius, is a cool month, with an average temperature ranging between max 52.2°F (11.2°C) and min 37.8°F (3.2°C). The average high-temperature for March is a fresh 52.2°F (11.2°C), closely aligning with the temperature of the preceding month. Weather in March »Weather in April
April is a refreshing spring month in Cornelius, Oregon, with an average temperature fluctuating between 39.4°F (4.1°C) and 58.3°F (14.6°C). April brings a slight rise in Cornelius's average high-temperature, moving from a cool 52.2°F (11.2°C) in March to a mild 58.3°F (14.6°C). Weather in April »Weather in May
May, the last month of the spring in Cornelius, is a comfortable month, with an average temperature fluctuating between 44.4°F (6.9°C) and 67.1°F (19.5°C). May signifies a subtle uplift in the average high-temperature, adjusting from a mild 58.3°F (14.6°C) in April to a still refreshing 67.1°F (19.5°C). Weather in May »Weather in June
June, the first month of the summer in Cornelius, is a pleasant month, with an average temperature ranging between max 72.7°F (22.6°C) and min 48.7°F (9.3°C). Cornelius observes a slight ascent in average high-temperatures during June, adjusting from a comfortable 67.1°F (19.5°C) in May to a pleasant 72.7°F (22.6°C). Weather in June »Weather in July
July is a moderately hot summer month in Cornelius, Oregon, with an average temperature fluctuating between 53.4°F (11.9°C) and 80.6°F (27°C). July brings a slight increase in the average high-temperature, progressing from a pleasant 72.7°F (22.6°C) in June to a warm 80.6°F (27°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Cornelius, Oregon, with an average temperature ranging between min 55.4°F (13°C) and max 81.5°F (27.5°C). In Cornelius, Oregon, the peak temperatures are generally noted in August, averaging a high of 81.5°F (27.5°C) and a low of 55.4°F (13°C). For most parts of August, the heat index is estimated at 84.2°F (29°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Cornelius, Oregon, with an average temperature varying between 73.9°F (23.3°C) and 51.4°F (10.8°C). Cornelius records a mild change in average high-temperature during September, easing from a warm 81.5°F (27.5°C) in August to a still moderately hot 73.9°F (23.3°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Cornelius, Oregon, with an average temperature varying between 45.1°F (7.3°C) and 61.2°F (16.2°C). The transition into October involves a decrease in the average high-temperature, falling from a moderately hot 73.9°F (23.3°C) in September to a comfortable 61.2°F (16.2°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Cornelius, Oregon, with an average temperature varying between 39.6°F (4.2°C) and 50.7°F (10.4°C). Cornelius in November undergoes a mild reduction in the average high-temperature, shifting from October's comfortable 61.2°F (16.2°C) to a fresh 50.7°F (10.4°C). Weather in November »Weather in December
December, the first month of the winter in Cornelius, is still a chilly month, with an average temperature ranging between max 43.9°F (6.6°C) and min 34°F (1.1°C). December brings the lowest temperatures, with an average high of 43.9°F (6.6°C) and an average low of 34°F (1.1°C). Weather in December »Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, February, November and December, with an average relative humidity of 85%, are most humid months.
The month with the most rainfall is January, when the rain falls for 18.8 days and typically aggregates up to 4.57" (116mm) of precipitation.
Throughout the year, there are 173 rainfall days, and 29.49" (749mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 6.6 snowfall days, and 4.53" (115mm) 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.
February is the month with the most snowfall. Snow falls for 2.4 days and accumulates 1.81" (46mm) of snow.
The month with the least sunshine is February, with an average of 3.7h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cornelius, 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 Cornelius, snow does not fall in April through October.
With an average of 15h and 36min of daylight, June has the longest days of the year.
July is the month with the highest UV index, with an average maximum UV index of 6.
Cornelius experiences its average highest temperatures in August, reaching a peak of 81.5°F (27.5°C) and a minimum of 55.4°F (13°C).
With an average relative humidity of 64%, August is the least humid month.
The month with the least rainfall in Cornelius is August, when the rain falls for 4.4 days and typically collects 0.31" (8mm) of precipitation.
August has the most sunshine of the year, with an average of 10.6h of sunshine.
With an average high-temperature of 43.9°F (6.6°C) and an average low-temperature of 34°F (1.1°C), December is the coldest month.
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Cornelius, OR
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (43.9°F).
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure
Cornelius, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"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:
30.04"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:
30.1"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
Cornelius, OR
- Average wind speed in January:
4.9mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.4mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.3mph - Average wind speed in September:
4.3mph - Average wind speed in October:
4.6mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).
Average humidity
Cornelius, OR
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).
Average rainfall
Cornelius, OR
- Average rainfall in January:
4.57" - Average rainfall in February:
3.19" - Average rainfall in March:
3.35" - Average rainfall in April:
2.64" - Average rainfall in May:
1.73" - Average rainfall in June:
1.1"
- Average rainfall in July:
0.39" - Average rainfall in August:
0.31" - Average rainfall in September:
1.46" - Average rainfall in October:
3.11" - Average rainfall in November:
3.19" - Average rainfall in December:
4.45"
The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days
Cornelius, OR
- Average rainfall days in January:
18.8 days - Average rainfall days in February:
16.8 days - Average rainfall days in March:
20.8 days - Average rainfall days in April:
18.6 days - Average rainfall days in May:
13.6 days - Average rainfall days in June:
11.4 days
- Average rainfall days in July:
5.1 days - Average rainfall days in August:
4.4 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
15.9 days - Average rainfall days in November:
18.7 days - Average rainfall days in December:
18.8 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall
Cornelius, OR
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Cornelius, OR
- Average snowfall days in January:
1.6 days - Average snowfall days in February:
2.4 days - Average snowfall days in March:
1.6 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:
0.3 days - Average snowfall days in December:
0.7 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Cornelius, 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 36min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - 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:
3h and 48min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 18min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 18min - Average sunshine in June:
8h and 54min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 36min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 6min - Average sunshine in November:
4h and 18min - Average sunshine in December:
3h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days
Cornelius, OR
- Average sunshine days in January:
10.8 days - Average sunshine days in February:
8.9 days - Average sunshine days in March:
8.5 days - Average sunshine days in April:
9 days - Average sunshine days in May:
16.2 days - Average sunshine days in June:
16.2 days
- Average sunshine days in July:
24.4 days - Average sunshine days in August:
24.3 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
14 days - Average sunshine days in November:
10.2 days - Average sunshine days in December:
10.5 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).
Average UV index
Cornelius, 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
Cornelius, OR
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Cornelius, OR
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January and February (4mi).
