Tri-Cities Weather in October
Average highs run from 74°F on October 1 to 57°F on October 31, and lows from 43°F to 35°F. Normal precipitation for the month is 0.66 in over about 6 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 66°F
- Average low
- 38°F
- Precipitation
- 0.66 in
- Record high
- 90°FOct 6, 2020
- Record low
- 9°FOct 31, 2002
- Chance of a freeze
- 94%
- Daylight
- 11 h 40 min to 10 h 06 min
- Cloud cover
- 56%
- Humidity
- 59%
- Dew point
- 37°F
- Wind
- 8.1 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 |
|---|---|---|---|---|---|---|
| Oct 1 | 74°F | 43°F | 85°F 2003 | 31°F 2002 | 14% | 0% |
| Oct 2 | 74°F | 43°F | 84°F 1945 | 30°F 2002 | 15% | 0% |
| Oct 3 | 73°F | 42°F | 83°F 2022 | 27°F 1999 | 15% | 0% |
| Oct 4 | 73°F | 42°F | 87°F 2020 | 30°F 1999 | 15% | 0% |
| Oct 5 | 72°F | 42°F | 84°F 2014 | 28°F 2012 | 16% | 0% |
| Oct 6 | 71°F | 41°F | 90°F 2020 | 27°F 2012 | 16% | 0% |
| Oct 7 | 71°F | 41°F | 88°F 2014 | 29°F 2012 | 16% | 0% |
| Oct 8 | 70°F | 41°F | 85°F 2020 | 29°F 2012 | 17% | 0% |
| Oct 9 | 70°F | 40°F | 85°F 1945 | 28°F 2019 | 17% | 0% |
| Oct 10 | 69°F | 40°F | 87°F 2022 | 22°F 2019 | 18% | 0% |
| Oct 11 | 69°F | 40°F | 82°F 1945 | 19°F 2009 | 18% | 0% |
| Oct 12 | 68°F | 39°F | 83°F 1945 | 22°F 2008 | 18% | 0% |
| Oct 13 | 68°F | 39°F | 82°F 1999 | 24°F 2002 | 19% | 0% |
| Oct 14 | 67°F | 39°F | 81°F 2024 | 26°F 2002 | 19% | 0% |
| Oct 15 | 66°F | 39°F | 81°F 1945 | 27°F 1999 | 20% | 0% |
| Oct 16 | 66°F | 38°F | 75°F 2020 | 23°F 1999 | 20% | 0% |
| Oct 17 | 65°F | 38°F | 82°F 2003 | 25°F 1999 | 20% | 0% |
| Oct 18 | 65°F | 38°F | 77°F 2014 | 27°F 1945 | 21% | 0% |
| Oct 19 | 64°F | 37°F | 78°F 2023 | 25°F 1998 | 21% | 0% |
| Oct 20 | 64°F | 37°F | 80°F 2024 | 27°F 1998 | 21% | 0% |
| Oct 21 | 63°F | 37°F | 88°F 2003 | 27°F 1945 | 22% | 0% |
| Oct 22 | 62°F | 37°F | 81°F 2003 | 25°F 2008 | 22% | 0% |
| Oct 23 | 62°F | 36°F | 71°F 2007 | 22°F 2020 | 23% | 0% |
| Oct 24 | 61°F | 36°F | 77°F 2007 | 22°F 2002 | 23% | 0% |
| Oct 25 | 61°F | 36°F | 76°F 2019 | 17°F 2020 | 23% | 0% |
| Oct 26 | 60°F | 36°F | 69°F 2024 | 18°F 2020 | 24% | 0% |
| Oct 27 | 60°F | 35°F | 70°F 2003 | 20°F 2020 | 24% | 0% |
| Oct 28 | 59°F | 35°F | 79°F 2003 | 23°F 2007 | 25% | 0% |
| Oct 29 | 59°F | 35°F | 72°F 2012 | 16°F 2019 | 25% | 0% |
| Oct 30 | 58°F | 35°F | 75°F 2015 | 13°F 2019 | 25% | 0% |
| Oct 31 | 57°F | 35°F | 71°F 2015 | 9°F 2002 | 26% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 6:56 AM, sunset 6:36 PM
- October 31
- sunrise 7:37 AM, sunset 5:43 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024163 (Pasco Tri Cities AP), public domain. Records: NOAA GHCN-Daily, station USW00024163, 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.