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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 Saint Helens, Oregon, is a frosty winter month, with an average temperature varying between 32.9°F (0.5°C) and 43.9°F (6.6°C). January experiences an average high-temperature of a frosty 43.9°F (6.6°C), barely different from December's 41.9°F (5.5°C). Weather in January »
Weather in February
The last month of the winter, February, is also a frosty month in Saint Helens, Oregon, with temperature in the range of an average high of 44.6°F (7°C) and an average low of 32.5°F (0.3°C). The introduction of February sees an average high-temperature of a still chilly 44.6°F (7°C), hardly deviating from January. Weather in February »
Weather in March
The first month of the spring, March, is still a chilly month in Saint Helens, Oregon, with an average temperature ranging between max 48.7°F (9.3°C) and min 33.8°F (1°C). The onset of March marks an average high-temperature of a still chilly 48.7°F (9.3°C), hardly differing from February's 44.6°F (7°C). Weather in March »
Weather in April
April in Saint Helens, Oregon, is a fresh spring month, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 36.1°F (2.3°C). Entering April, Saint Helens notices a subtle temperature elevation, with the average high-temperature advancing from March's chilly 48.7°F (9.3°C) to a fresh 54.3°F (12.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Saint Helens, Oregon, with temperature in the range of an average low of 39.9°F (4.4°C) and an average high of 62.8°F (17.1°C). The shift from April to May introduces a subtle increase in the average high-temperature, moving from a cool 54.3°F (12.4°C) to a refreshing 62.8°F (17.1°C). Weather in May »
Weather in June
June, the first month of the summer in Saint Helens, is still a refreshing month, with an average temperature ranging between min 43°F (6.1°C) and max 67.6°F (19.8°C). As May transitions into June, the average high-temperature rests at a still refreshing 67.6°F (19.8°C), maintaining a close resemblance to the previous month. Weather in June »
Weather in July
July is a moderately hot summer month in Saint Helens, Oregon, with an average temperature fluctuating between 46.6°F (8.1°C) and 75.4°F (24.1°C). The shift from June to July is marked by a slight increase in the average high-temperature, moving from a comfortable 67.6°F (19.8°C) to a moderately hot 75.4°F (24.1°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Helens, is another warm month, with an average temperature ranging between min 47.8°F (8.8°C) and max 76.5°F (24.7°C). In Saint Helens, the average temperatures in August are the highest, with a peak at 76.5°F (24.7°C) and a low of 47.8°F (8.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Saint Helens, Oregon, with an average temperature ranging between max 69.3°F (20.7°C) and min 45.5°F (7.5°C). The onset of September is marked by a minor decrease in temperature, transitioning from a warm 76.5°F (24.7°C) in August to an agreeable 69.3°F (20.7°C). Weather in September »
Weather in October
October, the same as September, in Saint Helens, Oregon, is another mild autumn month, with an average temperature fluctuating between 41.7°F (5.4°C) and 58.1°F (14.5°C). October shows a mild decline in the average high-temperature, falling from September's pleasant 69.3°F (20.7°C) to a moderate 58.1°F (14.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Saint Helens, is also a frosty month, with an average temperature fluctuating between 36.7°F (2.6°C) and 47.7°F (8.7°C). November shows a mild decline in the average high-temperature, falling from October's mild 58.1°F (14.5°C) to a chilly 47.7°F (8.7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Saint Helens, Oregon, with an average temperature varying between 31.8°F (-0.1°C) and 41.9°F (5.5°C). With an average high-temperature of 41.9°F (5.5°C) and an average low-temperature of 31.8°F (-0.1°C), December is the coldest month. Weather in December »
[Resources]Frequently asked questions
What is the rainiest month in Saint Helens?
January is the month with the most rainfall in Saint Helens, Oregon. Rain falls for 14.5 days and accumulates 2.64" (67mm) of precipitation.
How much does it rain in Saint Helens?
In Saint Helens, Oregon, during the entire year, the rain falls for 149 days and collects up to 19.37" (492mm) of precipitation.
When does it snow in Saint Helens?
January through April, November and December are months with snowfall in Saint Helens.
What is the snowiest month in Saint Helens?
January is the month with the most snowfall in Saint Helens, Oregon. Snow falls for 2.1 days and accumulates 1.97" (50mm) of snow.
How much does it snow in Saint Helens?
In Saint Helens, during the entire year, snow falls for 10.2 days and aggregates up to 5.91" (150mm) of snow.
What are the months with the least sunshine in Saint Helens?
The months with the least sunshine in Saint Helens, Oregon, are January, February and December, with an average of 3.7h of sunshine.
What is the most humid month in Saint Helens?
With an average relative humidity of 88%, February is the most humid month in Saint Helens.
When is Daylight Saving Time (DST) in Saint Helens?
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.
When it does not snow in Saint Helens?
May through October are months without snowfall in Saint Helens.
When are the longest days in Saint Helens?
June has the longest days of the year in Saint Helens, with an average of 15h and 42min of daylight.
What are the least humid months in Saint Helens?
The months with the lowest humidity in Saint Helens are July and August, with an average relative humidity of 72%.
What is the driest month in Saint Helens?
July is the month with the least rainfall in Saint Helens, Oregon. Rain falls for 5.9 days and accumulates 0.31" (8mm) of precipitation.
When is the highest UV index in Saint Helens?
July is the month with the highest UV index in Saint Helens, Oregon, with an average maximum UV index of 5.
What month is the hottest in Saint Helens?
Saint Helens notes the warmest temperatures in August, with a average high of 76.5°F (24.7°C) and a low of 47.8°F (8.8°C).
What month has the most sunshine in Saint Helens?
August has the most sunshine of the year in Saint Helens, Oregon, with an average of 10.4h of sunshine.
What is the month with the lowest UV index in Saint Helens?
November is the month with the lowest UV index in Saint Helens, with an average maximum UV index of 1.
What are the coldest months in Saint Helens?
December, known for its average high temperature of 41.9°F (5.5°C) and an average low temperature of 31.8°F (-0.1°C), is the coldest month.
What is the month with the shortest days in Saint Helens?
December has the shortest days of the year in Saint Helens, Oregon, with an average of 8h and 42min of daylight.
Average temperature
Saint Helens, OR
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (41.9°F).
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure
Saint Helens, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"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:
30.04"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"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
Saint Helens, OR
- Average wind speed in January:
5.3mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.8mph - Average wind speed in April:
4.3mph - Average wind speed in May:
3.9mph - Average wind speed in June:
3.7mph
- Average wind speed in July:
3.8mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4.3mph - Average wind speed in November:
5mph - Average wind speed in December:
4.9mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity
Saint Helens, OR
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall
Saint Helens, OR
- Average rainfall in January:
2.64" - Average rainfall in February:
1.85" - Average rainfall in March:
1.93" - Average rainfall in April:
1.77" - Average rainfall in May:
1.26" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.31" - Average rainfall in August:
0.47" - Average rainfall in September:
1.22" - Average rainfall in October:
2.32" - Average rainfall in November:
2.13" - Average rainfall in December:
2.52"
The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days
Saint Helens, OR
- Average rainfall days in January:
14.5 days - Average rainfall days in February:
12.3 days - Average rainfall days in March:
16 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
11.7 days
- Average rainfall days in July:
5.9 days - Average rainfall days in August:
6 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
14.9 days - Average rainfall days in December:
15 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.9 days).
Average snowfall
Saint Helens, OR
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Saint Helens, OR
- Average snowfall days in January:
2.1 days - Average snowfall days in February:
3.6 days - Average snowfall days in March:
2.1 days - Average snowfall days in April:
0.5 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:
1.2 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Saint Helens, OR
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - 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 3min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
4h and 5min - Average sunshine in April:
6h and 3min - Average sunshine in May:
7h and 5min - Average sunshine in June:
8h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 3min - Average sunshine in October:
5h and 1min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days
Saint Helens, OR
- Average sunshine days in January:
14.4 days - Average sunshine days in February:
12.1 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
16.8 days - Average sunshine days in June:
15.8 days
- Average sunshine days in July:
23.7 days - Average sunshine days in August:
23.2 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
13.9 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (12.1 days).
Average UV index
Saint Helens, OR
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover
Saint Helens, OR
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Saint Helens, OR
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Saint Helens, Oregon, USA
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