Climate and monthly weather forecastWaterloo, OR
Climate and monthly weather forecast
Weather in January
January, the same as December, in Waterloo, Oregon, is a frosty winter month, with an average temperature varying between 35.2°F (1.8°C) and 47.7°F (8.7°C). January's commencement is accompanied by an average high-temperature of a still frosty 47.7°F (8.7°C), diverging marginally from December's 45.3°F (7.4°C). Weather in January »Weather in February
The last month of the winter, February, is also a frosty month in Waterloo, Oregon, with an average temperature fluctuating between 48.4°F (9.1°C) and 34.7°F (1.5°C). In February, Waterloo experiences a minor shift in meteorological conditions with average high-temperatures marked at a still chilly 48.4°F (9.1°C), closely mirroring the climate in January. Weather in February »Weather in March
The first month of the spring, March, is a cool month in Waterloo, Oregon, with temperature in the range of an average high of 51.6°F (10.9°C) and an average low of 36.3°F (2.4°C). March's onset brings an average high-temperature of a cool 51.6°F (10.9°C), showing a minute difference from February's 48.4°F (9.1°C). Weather in March »Weather in April
April in Waterloo, Oregon, is a mild spring month, with an average temperature fluctuating between 37.9°F (3.3°C) and 57.6°F (14.2°C). The coming of April brings a minor shift in Waterloo's weather, with average high-temperatures adjusting from March's cool 51.6°F (10.9°C) to a moderate 57.6°F (14.2°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Waterloo, Oregon, with an average temperature varying between 41.5°F (5.3°C) and 65.3°F (18.5°C). The shift into May is marked by a modest rise in the average high-temperature, moving from April's moderate 57.6°F (14.2°C) to a comfortable 65.3°F (18.5°C). Weather in May »Weather in June
The first month of the summer, June, is a pleasant month in Waterloo, Oregon, with an average temperature fluctuating between 46°F (7.8°C) and 70.9°F (21.6°C). A slight uplift in the average high-temperature marks June, adjusting from May's refreshing 65.3°F (18.5°C) to an agreeable 70.9°F (21.6°C). Weather in June »Weather in July
July is a moderately hot summer month in Waterloo, Oregon, with an average temperature ranging between min 50.5°F (10.3°C) and max 79.5°F (26.4°C). In Waterloo, the average high-temperature in July slightly rises, from an agreeable 70.9°F (21.6°C) in June, to a warm 79.5°F (26.4°C). Weather in July »Weather in August
August, the last month of the summer in Waterloo, is also a moderately hot month, with an average temperature varying between 81.1°F (27.3°C) and 51.8°F (11°C). Waterloo experiences its highest temperatures in August, with an average peak of 81.1°F (27.3°C) and a low of 51.8°F (11°C). August's mean heat index is calculated to be 84.2°F (29°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Waterloo, Oregon, with an average temperature fluctuating between 48.9°F (9.4°C) and 73.4°F (23°C). September brings a slight decrease in the average high-temperature, shifting from a moderately hot 81.1°F (27.3°C) in August to a still warm 73.4°F (23°C). Weather in September »Weather in October
October, like September, in Waterloo, Oregon, is another comfortable autumn month, with an average temperature ranging between max 62.1°F (16.7°C) and min 44.2°F (6.8°C). The arrival of October signals a shift in temperature, down from a warm 73.4°F (23°C) in September to a comfortable 62.1°F (16.7°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Waterloo, Oregon, with an average temperature fluctuating between 39°F (3.9°C) and 51.4°F (10.8°C). The transition into November indicates a reduction in the average high-temperature, down to a fresh 51.4°F (10.8°C) from October's refreshing 62.1°F (16.7°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Waterloo, Oregon, with an average temperature ranging between max 45.3°F (7.4°C) and min 34.2°F (1.2°C). Waterloo's temperature records reveal December as the coldest month, marked by average highs of 45.3°F (7.4°C) and lows of 34.2°F (1.2°C). Weather in December »Updated: Jul 25, 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 through March and December, with an average relative humidity of 86%, are most humid months.
In Waterloo, during the entire year, the rain falls for 163.3 days and collects up to 29.92" (760mm) of precipitation.
January through March, November and December are months with snowfall.
In Waterloo, during the entire year, snow falls for 5.6 days and aggregates up to 4.09" (104mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 2.5 days and typically aggregates up to 2.13" (54mm) of snow.
The month with the least sunshine is February, with an average of 4.2h 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.
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 3.8 days and typically collects 0.24" (6mm) of precipitation.
July is the month with the highest UV index, with an average maximum UV index of 6.
Temperature readings reach their annual highs in August, averaging 81.1°F (27.3°C) and a minimum average of 51.8°F (11°C).
August is the least humid month, with an average relative humidity of 66%.
The month with the most sunshine is August, with an average of 11.2h of sunshine.
December, on average, is the coldest month, registering a high temperature of 45.3°F (7.4°C) and a low of 34.2°F (1.2°C).
December is the month with the most rainfall. Rain falls for 18 days and accumulates 4.41" (112mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 54min of daylight.
Average temperature
Waterloo, 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 (45.3°F).
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure
Waterloo, 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:
30.01"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 months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Waterloo, OR
- Average wind speed in January:
5.1mph - Average wind speed in February:
5mph - Average wind speed in March:
5.1mph - Average wind speed in April:
4.7mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
The windiest months (with the highest average wind speed) are January and March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity
Waterloo, OR
The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall
Waterloo, OR
- Average rainfall in January:
4.09" - Average rainfall in February:
3.43" - Average rainfall in March:
3.7" - Average rainfall in April:
3.07" - Average rainfall in May:
1.85" - Average rainfall in June:
1.34"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.31" - Average rainfall in September:
1.5" - Average rainfall in October:
2.68" - Average rainfall in November:
3.31" - Average rainfall in December:
4.41"
The wettest month (with the highest rainfall) is December (4.41").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Waterloo, OR
- Average rainfall days in January:
17.4 days - Average rainfall days in February:
16.9 days - Average rainfall days in March:
20.1 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
11 days
- Average rainfall days in July:
3.8 days - Average rainfall days in August:
3.8 days - Average rainfall days in September:
8.8 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
18 days - Average rainfall days in December:
18 days
The month with the highest number of rainy days is March (20.1 days).
The months with the least rainy days are July and August (3.8 days).
Average snowfall
Waterloo, OR
The month with the highest snowfall is February (2.13").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Waterloo, OR
- Average snowfall days in January:
1.1 days - Average snowfall days in February:
2.5 days - Average snowfall days in March:
1 days - Average snowfall days in April:
0.2 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:
0.7 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Waterloo, 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 12min - Average sunshine in March:
5h and 36min - Average sunshine in April:
7h and 6min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
11h and 6min - Average sunshine in August:
11h and 12min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 30min - Average sunshine in November:
4h and 54min - Average sunshine in December:
4h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days
Waterloo, OR
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
9.5 days - Average sunshine days in March:
9.1 days - Average sunshine days in April:
10 days - Average sunshine days in May:
15.5 days - Average sunshine days in June:
17 days
- Average sunshine days in July:
25.6 days - Average sunshine days in August:
25.3 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
15.2 days - Average sunshine days in November:
11.1 days - Average sunshine days in December:
11.6 days
The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is March (9.1 days).
Average UV index
Waterloo, 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
Waterloo, OR
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility
Waterloo, OR
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
