Climate and monthly weather forecastLummi Island, WA
Climate and monthly weather forecast
Weather in January
January is a frosty winter month in Lummi Island, Washington, with an average temperature ranging between max 43.3°F (6.3°C) and min 36°F (2.2°C). The shift into January records an average high-temperature of a frosty 43.3°F (6.3°C), subtly varied from December's 41.9°F (5.5°C). Weather in January »Weather in February
February, the last month of the winter in Lummi Island, is also a frosty month, with an average temperature ranging between max 44.2°F (6.8°C) and min 35.2°F (1.8°C). The transition from January to February sees average high-temperatures adjusting to a still chilly 44.2°F (6.8°C), from a not significantly different 43.3°F (6.3°C). Weather in February »Weather in March
The first month of the spring, March, is also a frosty month in Lummi Island, Washington, with an average temperature varying between 38.3°F (3.5°C) and 48.7°F (9.3°C). The weather during March records an average high-temperature of a still chilly 48.7°F (9.3°C), closely mirroring the preceding month. Weather in March »Weather in April
April is a cool spring month in Lummi Island, Washington, with temperature in the range of an average low of 41°F (5°C) and an average high of 54.1°F (12.3°C). The onset of April marks a slight increase in the average high-temperature, moving from a frosty 48.7°F (9.3°C) in March to a cool 54.1°F (12.3°C). Weather in April »Weather in May
May, the last month of the spring in Lummi Island, is a comfortable month, with an average temperature ranging between max 61.5°F (16.4°C) and min 45.7°F (7.6°C). With the onset of May, Lummi Island's average high-temperature sees a modest rise, moving from April's cool 54.1°F (12.3°C) to a comfortable 61.5°F (16.4°C). Weather in May »Weather in June
June, the first month of the summer in Lummi Island, is also an enjoyable month, with an average temperature ranging between min 48.9°F (9.4°C) and max 65.5°F (18.6°C). With the onset of June, the average high-temperature stands at a still refreshing 65.5°F (18.6°C), closely aligned with May's 61.5°F (16.4°C). Weather in June »Weather in July
July is a pleasant summer month in Lummi Island, Washington, with temperature in the range of an average high of 70.5°F (21.4°C) and an average low of 52.5°F (11.4°C). July's weather records an average high-temperature of an agreeable 70.5°F (21.4°C), showing little deviation from June. Weather in July »Weather in August
August, the last month of the summer in Lummi Island, is another pleasant month, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 71.1°F (21.7°C). Temperature records mark August as the warmest month, with highs averaging 71.1°F (21.7°C) and lows at 53.8°F (12.1°C). Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Lummi Island, Washington, with an average temperature ranging between min 50.9°F (10.5°C) and max 65.3°F (18.5°C). In Lummi Island, the average high-temperature in September slightly decreases from a pleasant 71.1°F (21.7°C) in August to an enjoyable 65.3°F (18.5°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Lummi Island, Washington, with an average temperature varying between 56.5°F (13.6°C) and 45.5°F (7.5°C). October's onset introduces a mild reduction in the average high-temperature, from an enjoyable 65.3°F (18.5°C) in September to a mild 56.5°F (13.6°C). Weather in October »Weather in November
November, the last month of the autumn in Lummi Island, is also a frosty month, with an average temperature varying between 39.9°F (4.4°C) and 47.7°F (8.7°C). Lummi Island's November weather features a light decline in high-temperatures, reducing from a mild 56.5°F (13.6°C) in October to a frosty 47.7°F (8.7°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Lummi Island, Washington, with an average temperature varying between 41.9°F (5.5°C) and 35.4°F (1.9°C). In Lummi Island, December is the coldest month, with temperatures averaging a high of 41.9°F (5.5°C) and a low of 35.4°F (1.9°C). Weather in December »Updated: Aug 23, 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 is the most humid month, with an average relative humidity of 84%.
Throughout the year, there are 178.6 rainfall days, and 37.32" (948mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
In Lummi Island, during the entire year, snow falls for 10.7 days and aggregates up to 6.57" (167mm) of snow.
January and December, with an average of 4.2h of sunshine, are months with the least sunshine.
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 3.8 days and typically aggregates up to 2.56" (65mm) 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.
With an average of 16h and 6min of daylight, June has the longest days of the year.
June and July, with an average maximum UV index of 5, are months with the highest UV index.
The least humid month is July, with an average relative humidity of 74%.
The month with the least rainfall is July, when the rain falls for 7.8 days and typically collects 0.67" (17mm) of precipitation.
The months with the most sunshine are July and August, with an average of 10.5h of sunshine.
August tends to be the warmest month, with temperatures averaging a daily high of 71.1°F (21.7°C) and a low of 53.8°F (12.1°C).
November is the month with the most rainfall. Rain falls for 20.1 days and accumulates 5.71" (145mm) of precipitation.
The coldest temperatures occur during December, when averages reach a peak of 41.9°F (5.5°C) and a low of 35.4°F (1.9°C).
December has the shortest days of the year, with an average of 8h and 24min of daylight.
Average temperature
Lummi Island, WA
The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is December (41.9°F).
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is February (35.2°F).
Average pressure
Lummi Island, WA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30"Hg - Average pressure in April:
30.04"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:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed
Lummi Island, WA
- Average wind speed in January:
6mph - Average wind speed in February:
6mph - Average wind speed in March:
5.8mph - Average wind speed in April:
5.2mph - Average wind speed in May:
4.2mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
4mph - Average wind speed in August:
3.7mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.9mph - Average wind speed in November:
6.2mph - Average wind speed in December:
6.1mph
The windiest month (with the highest average wind speed) is November (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity
Lummi Island, WA
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (74%).
Average rainfall
Lummi Island, WA
- Average rainfall in January:
5" - Average rainfall in February:
3.35" - Average rainfall in March:
4.09" - Average rainfall in April:
2.8" - Average rainfall in May:
1.97" - Average rainfall in June:
1.34"
- Average rainfall in July:
0.67" - Average rainfall in August:
1.02" - Average rainfall in September:
2.52" - Average rainfall in October:
4.09" - Average rainfall in November:
5.71" - Average rainfall in December:
4.76"
The wettest month (with the highest rainfall) is November (5.71").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days
Lummi Island, WA
- Average rainfall days in January:
17.3 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
20 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
12.6 days - Average rainfall days in June:
11.8 days
- Average rainfall days in July:
7.8 days - Average rainfall days in August:
7.3 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
16.4 days - Average rainfall days in November:
20.1 days - Average rainfall days in December:
18.3 days
The month with the highest number of rainy days is November (20.1 days).
The month with the least rainy days is August (7.3 days).
Average snowfall
Lummi Island, WA
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Lummi Island, WA
- Average snowfall days in January:
2.3 days - Average snowfall days in February:
3.8 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.3 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:
1.8 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Lummi Island, 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 42min - 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:
4h and 12min - Average sunshine in February:
4h and 18min - Average sunshine in March:
5h and 54min - Average sunshine in April:
8h and 12min - Average sunshine in May:
9h and 24min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 36min - Average sunshine in December:
4h and 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days
Lummi Island, WA
- Average sunshine days in January:
11.7 days - Average sunshine days in February:
9.4 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
16.7 days - Average sunshine days in June:
15.7 days
- Average sunshine days in July:
21.8 days - Average sunshine days in August:
21.9 days - Average sunshine days in September:
15.3 days - Average sunshine days in October:
13.5 days - Average sunshine days in November:
8.5 days - Average sunshine days in December:
11.2 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is November (8.5 days).
Average UV index
Lummi Island, WA
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Lummi Island, WA
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Lummi Island, WA
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
