Rialto Weather in October
Average highs run from 87°F on October 1 to 79°F on October 31, and lows from 58°F to 51°F. Normal precipitation for the month is 0.40 in over about 2 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
- 82°F
- Average low
- 55°F
- Precipitation
- 0.40 in
- Record high
- 110°FOct 4, 1987
- Record low
- 28°FOct 30, 1971
- Chance of a freeze
- 0%
- Days of 90°F or more
- 9.3
- Daylight
- 11 h 49 min to 10 h 49 min
- Cloud cover
- 24%
- Humidity
- 45%
- Dew point
- 38°F
- Wind
- 5.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Oct 1 | 87°F | 58°F | 109°F 1980 | 40°F 1971 | 4% |
| Oct 2 | 86°F | 58°F | 108°F 1980 | 43°F 1971 | 4% |
| Oct 3 | 86°F | 58°F | 104°F 1917 | 44°F 1916 | 4% |
| Oct 4 | 86°F | 57°F | 110°F 1987 | 40°F 1928 | 4% |
| Oct 5 | 85°F | 57°F | 103°F 1964 | 42°F 1916 | 4% |
| Oct 6 | 85°F | 57°F | 102°F 1964 | 43°F 1913 | 5% |
| Oct 7 | 84°F | 57°F | 104°F 1996 | 39°F 1916 | 5% |
| Oct 8 | 84°F | 57°F | 101°F 1910 | 42°F 1902 | 5% |
| Oct 9 | 84°F | 56°F | 102°F 1971 | 39°F 1949 | 5% |
| Oct 10 | 83°F | 56°F | 103°F 1971 | 40°F 1973 | 5% |
| Oct 11 | 83°F | 56°F | 100°F 1971 | 36°F 1924 | 5% |
| Oct 12 | 82°F | 56°F | 102°F 1950 | 39°F 1924 | 6% |
| Oct 13 | 82°F | 56°F | 103°F 1978 | 36°F 1928 | 6% |
| Oct 14 | 82°F | 55°F | 100°F 1958 | 36°F 1928 | 6% |
| Oct 15 | 82°F | 55°F | 101°F 1958 | 40°F 1982 | 6% |
| Oct 16 | 81°F | 55°F | 104°F 1958 | 40°F 1980 | 7% |
| Oct 17 | 81°F | 55°F | 103°F 1958 | 37°F 1971 | 7% |
| Oct 18 | 81°F | 54°F | 102°F 2003 | 40°F 1908 | 7% |
| Oct 19 | 81°F | 54°F | 101°F 2003 | 37°F 1949 | 7% |
| Oct 20 | 80°F | 54°F | 102°F 2003 | 34°F 1920 | 7% |
| Oct 21 | 80°F | 54°F | 104°F 2003 | 36°F 1949 | 7% |
| Oct 22 | 80°F | 54°F | 99°F 2003 | 37°F 1908 | 7% |
| Oct 23 | 80°F | 53°F | 101°F 1959 | 37°F 1954 | 8% |
| Oct 24 | 80°F | 53°F | 99°F 2003 | 36°F 1975 | 8% |
| Oct 25 | 80°F | 53°F | 99°F 2003 | 36°F 1971 | 8% |
| Oct 26 | 80°F | 53°F | 97°F 1926 | 39°F 1970 | 8% |
| Oct 27 | 79°F | 52°F | 97°F 1965 | 37°F 1970 | 8% |
| Oct 28 | 79°F | 52°F | 97°F 1915 | 34°F 1970 | 8% |
| Oct 29 | 79°F | 52°F | 98°F 1898 | 33°F 1971 | 8% |
| Oct 30 | 79°F | 52°F | 95°F 1962 | 28°F 1971 | 8% |
| Oct 31 | 79°F | 51°F | 98°F 1918 | 33°F 1971 | 8% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 6:44 AM, sunset 6:33 PM
- October 31
- sunrise 7:08 AM, sunset 5:57 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047473 (Riverside Citrus Exp), public domain. Records: NOAA GHCN-Daily, station USC00047306, 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.