Rubidoux in Winter
In winter (December, January and February), Rubidoux sees average daytime highs around 63°F and overnight lows near 43°F, with 10.8 in of rain over about 20 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 63°F. The sky is clear or mostly clear about 47% of the time across winter, and the air most often feels dry.
Winter is Rubidoux's 3rd-best season to visit on our travel score. For the whole year in context, see Rubidoux's year-round climate.
- Avg daytime high
- 63°F
- coldest season of the year
- Avg overnight low
- 43°F
- Rainfall
- 10.8 in
- 20 wet days
- Avg wind
- 3 mph
- Travel score
- 6.2
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Rubidoux in Winter
Across winter, daytime highs hold fairly steady around 63°F.
A typical winter day in Rubidoux reaches about 63°F and drops to 43°F overnight. The warmest of the three months is February, the coolest December.
How winter really feels in Rubidoux
Once humidity and wind are folded in, winter brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Rubidoux weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 63° / 42° | 3.8 | 6.6 | 10 | 6.2 |
| Feb | 64° / 44° | 4.4 | 7.4 | 10.7 | 6.2 |
| Mar | 67° / 47° | 2.7 | 6.8 | 11.7 | 6.8 |
| Apr | 71° / 50° | 1.2 | 4.6 | 12.8 | 7.8 |
| May | 76° / 55° | 0.6 | 2.6 | 13.7 | 8.6 |
| Jun | 83° / 60° | 0.1 | 0.5 | 14.2 | 7.8 |
| Jul | 89° / 65° | 0.1 | 0.5 | 14 | 5.5 |
| Aug | 91° / 67° | 0.0 | 0.3 | 13.3 | 4.9 |
| Sep | 88° / 63° | 0.2 | 1.2 | 12.2 | 6.1 |
| Oct | 79° / 56° | 0.9 | 3.1 | 11.1 | 8.3 |
| Nov | 70° / 48° | 1.2 | 3.5 | 10.2 | 7.9 |
| Dec | 62° / 42° | 2.6 | 5.8 | 9.8 | 6.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 47% of the time across winter.
Chance of precipitation in Winter
Rubidoux gets around 10.8 in of rain over 20 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 3 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 54 min in early December to 11 h 12 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.3 kWh/m².
Is winter a good time to visit Rubidoux?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Rubidoux for sightseeing.
What to pack for Rubidoux in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Rubidoux sees daytime highs around 63°F and nights near 43°F. Worth packing: a warm layer. About 20 days see rain.
Sea temperature near Rubidoux in Winter
The nearest coast averages about 60°F across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 37 mi away) is warmest in August at about 69°F and coldest in February near 59°F.
It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 59 | 59 | 59 | 60 | 63 | 65 | 68 | 69 | 69 | 67 | 64 | 60 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 59 | Cool |
| Feb | 59 | Cool |
| Mar | 59 | Cool |
| Apr | 60 | Cool |
| May | 63 | Cool |
| Jun | 65 | Cool |
| Jul | 68 | Refreshing |
| Aug | 69 | Refreshing |
| Sep | 69 | Refreshing |
| Oct | 67 | Cool |
| Nov | 64 | Cool |
| Dec | 60 | Cool |
UV index in Rubidoux in Winter
Clear-sky midday UV across winter averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rubidoux peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 5 | 5 | 8 | 8 | 11 | 11 | 10 | 8 | 6 | 3 | 3 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | Moderate |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 3 | Moderate |
Air quality in Rubidoux in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Rubidoux is worst in September — around 49 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (May, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 18 | 19 | 19 | 17 | 12 | 17 | 19 | 32 | 49 | 21 | 21 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 19 | Moderate |
| Mar | 19 | Moderate |
| Apr | 17 | Moderate |
| May | 12 | Moderate |
| Jun | 17 | Moderate |
| Jul | 19 | Moderate |
| Aug | 32 | Moderate |
| Sep | 49 | Poor |
| Oct | 21 | Moderate |
| Nov | 21 | Moderate |
| Dec | 18 | Moderate |
Where is Rubidoux?
Rubidoux sits at 34.0°N, 117.4°W, 774 ft above sea level, in United States. The nearest listed city is Riverside, 3.1 mi away.
Topography around Rubidoux
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Rubidoux.
Within 2 miles, the terrain around Rubidoux has significant variations in elevation — a maximum elevation change of 974 ft around an average of 866 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,526 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,421 ft.
The land around Rubidoux is covered by artificial surfaces (42%) and grassland (20%) within 2 miles, artificial surfaces (58%) within 10 miles, and shrubs (27%) and artificial surfaces (21%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rubidoux (33.9961°, -117.4056°, elevation 774 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.