Sumas Weather in July
Average highs run from 73°F on July 1 to 78°F on July 31, and lows from 50°F to 52°F. Normal precipitation for the month is 1.45 in over about 6 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 76°F
- Average low
- 51°F
- Precipitation
- 1.45 in
- Record high
- 96°FJul 29, 2009
- Record low
- 40°FJul 6, 1952
- Chance of a freeze
- 0%
- Days of 90°F or more
- 1.1
- Daylight
- 16 h 08 min to 15 h 08 min
- Cloud cover
- 52%
- Humidity
- 77%
- Dew point
- 56°F
- Wind
- 3.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jul 1 | 73°F | 50°F | 84°F 2014 | 44°F 2009 | 30% | 0% |
| Jul 2 | 73°F | 50°F | 86°F 1968 | 41°F 1949 | 29% | 0% |
| Jul 3 | 74°F | 50°F | 84°F 1968 | 41°F 1949 | 29% | 0% |
| Jul 4 | 74°F | 51°F | 86°F 2018 | 44°F 1986 | 28% | 0% |
| Jul 5 | 74°F | 51°F | 93°F 2015 | 41°F 1951 | 27% | 0% |
| Jul 6 | 74°F | 51°F | 87°F 1958 | 40°F 1952 | 27% | 0% |
| Jul 7 | 74°F | 51°F | 88°F 1953 | 40°F 1957 | 26% | 0% |
| Jul 8 | 75°F | 51°F | 88°F 2010 | 46°F 1949 | 26% | 0% |
| Jul 9 | 75°F | 51°F | 88°F 2024 | 42°F 2011 | 25% | 0% |
| Jul 10 | 75°F | 51°F | 86°F 2007 | 45°F 1967 | 24% | 0% |
| Jul 11 | 75°F | 51°F | 94°F 2007 | 44°F 2008 | 24% | 0% |
| Jul 12 | 76°F | 51°F | 92°F 1951 | 45°F 1954 | 24% | 0% |
| Jul 13 | 76°F | 51°F | 86°F 2014 | 44°F 1954 | 23% | 0% |
| Jul 14 | 76°F | 51°F | 87°F 1949 | 46°F 1969 | 23% | 0% |
| Jul 15 | 76°F | 51°F | 89°F 1958 | 44°F 1969 | 22% | 0% |
| Jul 16 | 76°F | 51°F | 89°F 1958 | 45°F 1968 | 22% | 0% |
| Jul 17 | 77°F | 51°F | 88°F 1979 | 43°F 1955 | 22% | 0% |
| Jul 18 | 77°F | 51°F | 87°F 1956 | 46°F 1977 | 21% | 0% |
| Jul 19 | 77°F | 52°F | 89°F 1956 | 44°F 1955 | 21% | 0% |
| Jul 20 | 77°F | 52°F | 90°F 1994 | 45°F 1955 | 21% | 0% |
| Jul 21 | 77°F | 52°F | 89°F 1978 | 45°F 1966 | 20% | 0% |
| Jul 22 | 77°F | 52°F | 89°F 2026 | 46°F 1966 | 20% | 0% |
| Jul 23 | 77°F | 52°F | 89°F 1991 | 44°F 1964 | 20% | 0% |
| Jul 24 | 78°F | 52°F | 86°F 2004 | 43°F 1957 | 20% | 0% |
| Jul 25 | 78°F | 52°F | 92°F 1988 | 45°F 1952 | 19% | 0% |
| Jul 26 | 78°F | 52°F | 90°F 2022 | 45°F 1969 | 19% | 0% |
| Jul 27 | 78°F | 52°F | 90°F 1958 | 48°F 1953 | 19% | 0% |
| Jul 28 | 78°F | 52°F | 90°F 2009 | 41°F 1954 | 19% | 0% |
| Jul 29 | 78°F | 52°F | 96°F 2009 | 44°F 1969 | 18% | 0% |
| Jul 30 | 78°F | 52°F | 93°F 1965 | 46°F 1986 | 18% | 0% |
| Jul 31 | 78°F | 52°F | 90°F 1965 | 45°F 1957 | 18% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- July 1
- sunrise 5:09 AM, sunset 9:17 PM
- July 31
- sunrise 5:41 AM, sunset 8:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00451484 (Clearbrook), public domain. Records: NOAA GHCN-Daily, station USW00024217, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.