July weather forecastSumas, WA
July
Weather in July
July in Sumas, Washington, is an agreeable summer month, with an average temperature ranging between min 49.6°F (9.8°C) and max 73°F (22.8°C).Temperature
July's arrival coincides with a subtle temperature rise, moving from June's comfortable 66.2°F (19°C) to a pleasant 73°F (22.8°C). A sharp divergence from daytime highs is noted in Sumas during the month of July, with the average nighttime temperature settling at a chilly 49.6°F (9.8°C).Humidity
July is the least humid month in Sumas, with an average relative humidity of 73%.Rainfall
July is the month with the least rainfall in Sumas. Rain falls for 8.3 days and accumulates 0.91" (23mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Sumas, the average length of the day in July is 15h and 43min.On the first day of the month, sunrise is at 5:09 am and sunset at 9:16 pm. On the last day of July, in Sumas, sunrise is at 5:41 am and sunset at 8:48 pm PDT.
Sunshine
In July, the average sunshine in Sumas is 10.2h.UV index
July is the month with the highest UV index in Sumas, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 5 during July leads to these advisories:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Sumas, WA
- Average high temperature in July: 73°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in July: 49.6°F
The month with the highest average low temperature is August (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (31.6°F).
Average pressure in July
Sumas, WA
- Average pressure in July: 30.03"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and August (30"Hg).
Average wind speed in July
Sumas, WA
- Average wind speed in July: 3.5mph
The windiest months (with the highest average wind speed) are January and February (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in July
Sumas, WA
- Average humidity in July: 73%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (73%).
Average rainfall in July
Sumas, WA
- Average rainfall in July: 0.91"
The wettest month (with the highest rainfall) is November (7.72").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in July
Sumas, WA
- Average rainfall days in July: 8.3 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in July
Sumas, WA
- Average snowfall in July: 0"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in July
Sumas, WA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Sumas, WA
- Average daylight in July: 15h and 42min
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 18min).
- Average sunshine in July: 10h and 12min
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 48min).
Average sunshine days in July
Sumas, WA
- Average sunshine days in July: 21 days
The months with the most sunshine days are July and August (21 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in July
Sumas, WA
- Average UV index in July: 5
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in July
Sumas, WA
- Average cloud cover in July: 30
The month with the most cloud cover is March (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in July
Sumas, WA
- Average visibility in July: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
