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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January in Hartline, Washington, is a cold winter month, with an average temperature fluctuating between 32°F (0°C) and 21.9°F (-5.6°C). The commencement of January records an average high-temperature of an icy 32°F (0°C), barely varying from December's 31.6°F (-0.2°C). Weather in January »
Weather in February
February, the last month of the winter in Hartline, is another cold month, with an average temperature fluctuating between 24.1°F (-4.4°C) and 35.6°F (2°C). As February takes its course, Hartline's average high-temperature registers at a still icy 35.6°F (2°C), closely aligning with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Hartline, Washington, with an average temperature ranging between min 32°F (0°C) and max 46°F (7.8°C). Hartline sees a rise in temperature during March, with average high-temperatures transitioning from a wintry 35.6°F (2°C) in February to a frosty 46°F (7.8°C). Weather in March »
Weather in April
April in Hartline, Washington, is a mild spring month, with an average temperature varying between 37.9°F (3.3°C) and 57°F (13.9°C). The arrival of April signals an increase in the average high-temperature, moving from a frosty 46°F (7.8°C) in March to a moderate 57°F (13.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Hartline, Washington, with an average temperature ranging between max 67.6°F (19.8°C) and min 46°F (7.8°C). In Hartline, the onset of May comes with an increased average high-temperature, moving from April's mild 57°F (13.9°C) to an enjoyable 67.6°F (19.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Hartline, Washington, with an average temperature varying between 51.8°F (11°C) and 74.3°F (23.5°C). June's arrival brings a modest temperature shift, moving from an enjoyable 67.6°F (19.8°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »
Weather in July
July, like June, in Hartline, Washington, is a moderately hot summer month, with an average temperature fluctuating between 59.7°F (15.4°C) and 84.9°F (29.4°C). The temperatures reach their highest averages in July, with highs of 84.9°F (29.4°C) and lows of 59.7°F (15.4°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Hartline, Washington, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 61.3°F (16.3°C). With the onset of August, a modest change to a still warm 84.2°F (29°C) from July's 84.9°F (29.4°C) is noted in high-temperature. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Hartline, Washington, with an average temperature varying between 72.7°F (22.6°C) and 53.2°F (11.8°C). The arrival of September corresponds with a shift in temperature, down from a warm 84.2°F (29°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Hartline, Washington, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 41.4°F (5.2°C). With the onset of October, Hartline's average high-temperature witnesses a clear drop, receding from September's pleasant 72.7°F (22.6°C) to a mild 56.3°F (13.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Hartline, is also an icy month, with temperature in the range of an average low of 30.7°F (-0.7°C) and an average high of 41.4°F (5.2°C). November signals a clear decrease in the average high-temperature, dropping from October's refreshing 56.3°F (13.5°C) to an icy 41.4°F (5.2°C). Weather in November »
Weather in December
December, the first month of the winter in Hartline, is still a freezing cold month, with temperature in the range of an average high of 31.6°F (-0.2°C) and an average low of 21.4°F (-5.9°C). December, recording an average high temperature of 31.6°F (-0.2°C) and a low temperature of 21.4°F (-5.9°C), is Hartline's coldest month. Weather in December »
Updated: Jul 21, 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
What is the most humid month?
The most humid month is January, with an average relative humidity of 89%.
How much does it rain?
In Hartline, during the entire year, the rain falls for 102.1 days and collects up to 9.65" (245mm) of precipitation.
When does it snow?
Months with snowfall are January through April, September through December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 8.4 days and typically aggregates up to 4.41" (112mm) of snow.
How much does it snow in Hartline?
In Hartline, during the entire year, snow falls for 33.4 days and aggregates up to 14.65" (372mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.1h of sunshine.
When is Daylight Saving Time (DST)?
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.
What is the rainiest month?
The months with the most rainfall are May and December, with an average 1.18" (30mm) of precipitation.
When it does not snow?
May through August are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 54min of daylight.
What part of the year is the hottest?
July, recognised by an average high temperature of 84.9°F (29.4°C) and a low of 59.7°F (15.4°C), is Hartline's warmest month.
What is the driest month?
The months with the least rainfall are July and August Rain falls for 4.2 days and accumulates 0.2" (5mm) of rain.
When is the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What is the least humid month?
With an average relative humidity of 36%, August is the least humid month.
What month has the most sunshine?
The month with the most sunshine is August, with an average of 12.1h of sunshine.
What is the month with the lowest UV index?
The month with the lowest UV index is November, with an average maximum UV index of 1.
What part of the year is the coldest?
December is the coldest month of the year, registering average temperatures as high as 31.6°F (-0.2°C) and as low as 21.4°F (-5.9°C).
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 30min of daylight.
Average temperature
Hartline, WA
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (31.6°F).
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure
Hartline, WA
- Average pressure in January:
30.18"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed
Hartline, WA
- Average wind speed in January:
4.9mph - Average wind speed in February:
5.3mph - Average wind speed in March:
6.3mph - Average wind speed in April:
7mph - Average wind speed in May:
6.3mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.8mph - Average wind speed in October:
5.9mph - Average wind speed in November:
5.8mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity
Hartline, WA
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (36%).
Average rainfall
Hartline, WA
- Average rainfall in January:
1.14" - Average rainfall in February:
0.75" - Average rainfall in March:
1.06" - Average rainfall in April:
0.79" - Average rainfall in May:
1.18" - Average rainfall in June:
0.75"
The wettest months (with the highest rainfall) are May and December (1.18").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days
Hartline, WA
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
10.8 days - Average rainfall days in June:
8.4 days
- Average rainfall days in July:
4.2 days - Average rainfall days in August:
3.2 days - Average rainfall days in September:
5.5 days - Average rainfall days in October:
10.3 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.2 days).
Average snowfall
Hartline, WA
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Hartline, WA
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
6.9 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.8 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:
0.1 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
3.3 days - Average snowfall days in December:
10.5 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Hartline, WA
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 2min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
15h and 5min
- Average daylight in July:
15h and 3min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
7h and 2min - Average sunshine in April:
10h and 1min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
12h and 1min - Average sunshine in September:
10h and 4min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Hartline, WA
- Average sunshine days in January:
16 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
18 days - Average sunshine days in June:
19.9 days
- Average sunshine days in July:
25.5 days - Average sunshine days in August:
25.8 days - Average sunshine days in September:
23.3 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
15.4 days - Average sunshine days in December:
16 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is March (14.7 days).
Average UV index
Hartline, WA
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 1).
Average cloud cover
Hartline, WA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility
Hartline, WA
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Hartline, Washington, USA
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