Riverside, CA weather in October
Expect warm, dry weather in Riverside in October, with highs near 83°F and lows near 55°F. Rain falls on about 1 day.
- Normal high
- 83°F
- Normal low
- 55°F
- Wet days
- 1
- 0.4 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 87°F | 79°F |
| Normal low | 59°F | 51°F |
| Chance of a wet day | 3% | 5% |
| Sunrise / sunset | 6:44 am / 6:34 pm | 7:08 am / 5:58 pm |
| Daylight | 11.8 h | 10.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical October day
- 6 am53°Fdew point 44°F
- 9 am68°Fdew point 45°F
- Noon80°Fdew point 40°F
- 3 pm80°Fdew point 41°F
- 6 pm69°Fdew point 45°F
- 9 pm62°Fdew point 47°F
NOAA hourly normals (local standard time) from March AFB (9 mi away); average wind 5 mph; clear or few clouds in 72% of daytime hours, mostly cloudy or overcast in 21%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 31
- Hot dayshigh 90°F or more9 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow1 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 0.4 in; a dry October brings about 0.0 in and a wet one about 0.5 in (25th and 75th percentiles). Days with half an inch or more are rare.
How October varies from year to year
- Warmest October, 1991-20201999: average high 90°F
- Coolest October2000: average high 75°F
- Wettest October2004: 5.3 in
- Driest October1995: no measurable precipitation
- Highest reading107°F (October 1, 2012)
- Lowest reading41°F (October 29, 2006)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 91°F | 83°F | 75°F |
| Normal low | 62°F | 55°F | 47°F |
| Wet days | 0 | 1 | 2 |
| Comfortable days | 4 | 11 | 17 |
| Daylight | 12.4 h | 11.3 h | 10.4 h |
Highs change by -8°F from September and -8°F into November.
Nearby alternatives in October
- Warmer: Palm Springs, CA50 mi · high 91°F · 1 wet day
- Cooler: Big Bear Lake, CA34 mi · high 63°F · 2 wet days
How Riverside ranks in October
- Normal high48th warmest of 378 cities; 9th of 60 in California
- Wet days5th driest of 378
- Comfortable days187th most of 340
What to pack for Riverside in October
- Layers – afternoons near 83°F but nights near 55°F
Heating and cooling
October has 31 heating degree days and 154 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Riverside in October?
The normal high is 83°F and the normal low is 55°F. From 1991 to 2020 the hottest October reading was 107°F (October 1, 2012).
Does it rain a lot in Riverside in October?
About 1 days in October have at least 0.01 in of precipitation, and the normal total is 0.4 in. The wettest October in 1991-2020 was in 2004 (5.3 in); the driest was in 1995, with no measurable precipitation.
Is October a good time to visit Riverside?
October ranks 9th of 12 months on our comfort score for Riverside (59 out of 100). It has about 11 comfortable days and about 9 days at 90°F or hotter. The best months are March, April and May.
Where the numbers come from
- Temperature and frost dates: Riverside Muni Airport (USW00003171), 2.4 mi W of the city center, 805 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Riverside Fire Stn 3 (USC00047470), 0.5 mi ESE of the city center, 840 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: March AFB (USW00023119), 9.2 mi ESE of the city center, 1,516 ft (687 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: March Air Reserve Base (722860-23119), 9.2 mi ESE of the city center, 1,536 ft (707 ft higher than the city). Hourly observations, 1991-2020.