Climate and monthly weather forecastHamilton, WA
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Hamilton, Washington, with an average temperature ranging between min 33.6°F (0.9°C) and max 42.1°F (5.6°C). Entering January, Hamilton's average high-temperature reads a still cold 42.1°F (5.6°C), indicating a close resemblance to the previous month's climate. Weather in January »Weather in February
February, the last month of the winter in Hamilton, is also a wintry month, with an average temperature varying between 42.4°F (5.8°C) and 32.5°F (0.3°C). Shifting into February, Hamilton records an average high-temperature of a still cold 42.4°F (5.8°C), presenting minor fluctuations compared to the previous month. Weather in February »Weather in March
March, the first month of the spring in Hamilton, is a frosty month, with temperature in the range of an average low of 35.1°F (1.7°C) and an average high of 46.6°F (8.1°C). As Hamilton steps into March, the average high-temperature holds at a chilly 46.6°F (8.1°C), hinting at a minor fluctuation from the prior month. Weather in March »Weather in April
April in Hamilton, Washington, is a fresh spring month, with an average temperature fluctuating between 52°F (11.1°C) and 37.8°F (3.2°C). April marks a minor ascent in the average high-temperature, adjusting from March's frosty 46.6°F (8.1°C) to a fresh 52°F (11.1°C). Weather in April »Weather in May
The last month of the spring, May, is a mild month in Hamilton, Washington, with an average temperature varying between 42.8°F (6°C) and 60.6°F (15.9°C). The coming of May brings a minor shift in Hamilton's weather, with average high-temperatures adjusting from April's cool 52°F (11.1°C) to a mild 60.6°F (15.9°C). Weather in May »Weather in June
June, the first month of the summer in Hamilton, is an enjoyable month, with an average temperature fluctuating between 45.9°F (7.7°C) and 64°F (17.8°C). Hamilton, Washington, records a slight change with June's average high-temperatures adjusting to a comfortable 64°F (17.8°C) from May's 60.6°F (15.9°C). Weather in June »Weather in July
July is a pleasant summer month in Hamilton, Washington, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 49.1°F (9.5°C). Hamilton's warmest temperatures are experienced in July, with average high temperatures of 70.9°F (21.6°C) and lows of 49.1°F (9.5°C). Weather in July »Weather in August
August, the last month of the summer in Hamilton, is also an agreeable month, with an average temperature fluctuating between 50.5°F (10.3°C) and 70.7°F (21.5°C). As Hamilton, Washington, welcomes August, the average high-temperature records at a still pleasant 70.7°F (21.5°C), marking an insignificant deviation from the prior month. Weather in August »Weather in September
The first month of the autumn, September, is still a refreshing month in Hamilton, Washington, with temperature in the range of an average high of 64.2°F (17.9°C) and an average low of 47.8°F (8.8°C). As August transitions into September, Hamilton sees a gentle drop in the average high-temperature, transitioning from a pleasant 70.7°F (21.5°C) to a comfortable 64.2°F (17.9°C). Weather in September »Weather in October
October, the same as September, is another fresh autumn month in Hamilton, Washington, with an average temperature ranging between min 42.4°F (5.8°C) and max 55°F (12.8°C). October implies a gentle temperature shift, with average high-temperatures reducing from September's comfortable 64.2°F (17.9°C) to a fresh 55°F (12.8°C). Weather in October »Weather in November
November, the last month of the autumn in Hamilton, is also a frosty month, with an average temperature fluctuating between 45.5°F (7.5°C) and 37.6°F (3.1°C). November's onset brings a slight change in high-temperatures, falling from a cool 55°F (12.8°C) in October to a frosty 45.5°F (7.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Hamilton, Washington, with temperature in the range of an average high of 40.5°F (4.7°C) and an average low of 32.5°F (0.3°C). Temperature readings reach their annual highs in December, averaging 40.5°F (4.7°C) and a minimum average of 32.5°F (0.3°C). Weather in December »Updated: Feb 14, 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
January through March, with an average relative humidity of 86%, are most humid months.
Throughout the year, there are 203.2 rainfall days, and 49.72" (1263mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
In Hamilton, Washington, during the entire year, snow falls for 12 days and aggregates up to 12.32" (313mm) of snow.
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Hamilton, Washington.
February is the month with the most snowfall in Hamilton. Snow falls for 4.3 days and accumulates 4.96" (126mm) of snow.
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.
May through October are months without snowfall in Hamilton.
June has the longest days of the year in Hamilton, Washington, with an average of 16h and 6min of daylight.
In Hamilton, the average temperatures in July are the highest, with a peak at 70.9°F (21.6°C) and a low of 49.1°F (9.5°C).
The least humid month is July, with an average relative humidity of 75%.
July is the month with the least rainfall in Hamilton. Rain falls for 9.8 days and accumulates 0.98" (25mm) of precipitation.
The month with the highest UV index in Hamilton, Washington, is July, with an average maximum UV index of 5.
The month with the most sunshine is August, with an average of 10.3h of sunshine.
November is the month with the most rainfall in Hamilton, Washington. Rain falls for 21.1 days and accumulates 7.09" (180mm) of precipitation.
December, having an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 32.5°F (0.3°C), is the coldest month.
The month with the shortest days in Hamilton is December, with an average of 8h and 24min of daylight.
With an average of 3.5h of sunshine, December has the least sunshine of the year in Hamilton.
Average temperature
Hamilton, WA
The warmest month (with the highest average high temperature) is July (70.9°F).
The month with the lowest average high temperature is December (40.5°F).
The month with the highest average low temperature is August (50.5°F).
The coldest months (with the lowest average low temperature) are February and December (32.5°F).
Average pressure
Hamilton, WA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
30.01"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:
30.03"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Hamilton, WA
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.4mph - Average wind speed in April:
4.7mph - Average wind speed in May:
3.9mph - Average wind speed in June:
3.7mph
- Average wind speed in July:
3.5mph - Average wind speed in August:
3.3mph - Average wind speed in September:
3.8mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.7mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is November (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity
Hamilton, WA
The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is July (75%).
Average rainfall
Hamilton, WA
- Average rainfall in January:
6.54" - Average rainfall in February:
5.12" - Average rainfall in March:
5.55" - Average rainfall in April:
4.17" - Average rainfall in May:
2.91" - Average rainfall in June:
2.24"
- Average rainfall in July:
0.98" - Average rainfall in August:
1.14" - Average rainfall in September:
2.76" - Average rainfall in October:
5.16" - Average rainfall in November:
7.09" - Average rainfall in December:
6.06"
The wettest month (with the highest rainfall) is November (7.09").
The driest month (with the least rainfall) is July (0.98").
Average rainfall days
Hamilton, WA
- Average rainfall days in January:
18.8 days - Average rainfall days in February:
17.3 days - Average rainfall days in March:
22.1 days - Average rainfall days in April:
20.8 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
9.8 days - Average rainfall days in August:
9.4 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
17.7 days - Average rainfall days in November:
21.1 days - Average rainfall days in December:
20.6 days
The month with the highest number of rainy days is March (22.1 days).
The month with the least rainy days is August (9.4 days).
Average snowfall
Hamilton, WA
The month with the highest snowfall is February (4.96").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Hamilton, WA
- Average snowfall days in January:
2.6 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.1 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:
0.7 days - Average snowfall days in December:
2.1 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Hamilton, WA
- Average daylight in January:
8h and 48min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 18min - Average daylight in June:
16h and 6min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 12min - Average sunshine in April:
7h and 12min - Average sunshine in May:
8h and 36min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 6min - Average sunshine in November:
4h and 0min - Average sunshine in December:
3h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days
Hamilton, WA
- Average sunshine days in January:
9.9 days - Average sunshine days in February:
8.3 days - Average sunshine days in March:
7.3 days - Average sunshine days in April:
7.4 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
18.8 days - Average sunshine days in August:
19.2 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
12.4 days - Average sunshine days in November:
7.8 days - Average sunshine days in December:
9 days
The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is March (7.3 days).
Average UV index
Hamilton, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Hamilton, WA
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Hamilton, WA
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
