Imperial Beach in Winter
In winter (December, January and February), Imperial Beach sees average daytime highs around 61°F and overnight lows near 52°F, with 7.6 in of rain over about 19 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 61°F. The sky is clear or mostly clear about 50% of the time across winter, and the air most often feels dry.
Winter is Imperial Beach's weakest season of the year to visit on our travel score. For the whole year in context, see Imperial Beach's year-round climate.
- Avg daytime high
- 61°F
- coldest season of the year
- Avg overnight low
- 52°F
- Rainfall
- 7.6 in
- 19 wet days
- Avg wind
- 6 mph
- Travel score
- 5.7
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Imperial Beach in Winter
Across winter, daytime highs hold fairly steady around 61°F.
A typical winter day in Imperial Beach reaches about 61°F and drops to 52°F overnight. The warmest of the three months is December, the coolest January.
Imperial Beach 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 | 61° / 52° | 2.5 | 6.1 | 10.1 | 5.8 |
| Feb | 61° / 52° | 3.1 | 7 | 10.8 | 5.4 |
| Mar | 61° / 53° | 2.1 | 5.9 | 11.8 | 5.8 |
| Apr | 63° / 55° | 1.0 | 4.2 | 12.8 | 6.7 |
| May | 65° / 58° | 0.4 | 2.1 | 13.6 | 7.5 |
| Jun | 68° / 60° | 0.1 | 0.4 | 14.1 | 8.3 |
| Jul | 72° / 65° | 0.1 | 0.4 | 13.9 | 8.8 |
| Aug | 74° / 66° | 0.0 | 0.3 | 13.2 | 9.2 |
| Sep | 73° / 65° | 0.2 | 0.8 | 12.2 | 9.0 |
| Oct | 70° / 62° | 0.6 | 2.4 | 11.2 | 8.3 |
| Nov | 66° / 56° | 1.0 | 3.6 | 10.3 | 7.4 |
| Dec | 61° / 52° | 2.0 | 5.7 | 9.9 | 6.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 50% of the time across winter.
Chance of precipitation in Winter
Imperial Beach gets around 7.6 in of rain over 19 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 6 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 hours 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 3.6 kWh/m².
Is winter a good time to visit Imperial Beach?
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 Imperial Beach for sightseeing.
What to pack for Imperial Beach in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Imperial Beach sees daytime highs around 61°F and nights near 52°F. Worth packing: a warm layer. About 19 days see rain.
Sea temperature near Imperial Beach 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 offshore is warmest in August at about 70°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) | 60 | 59 | 60 | 61 | 63 | 65 | 68 | 70 | 69 | 67 | 64 | 61 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 60 | Cool |
| Feb | 59 | Cool |
| Mar | 60 | Cool |
| Apr | 61 | Cool |
| May | 63 | Cool |
| Jun | 65 | Cool |
| Jul | 68 | Refreshing |
| Aug | 70 | Refreshing |
| Sep | 69 | Refreshing |
| Oct | 67 | Cool |
| Nov | 64 | Cool |
| Dec | 61 | Cool |
UV index in Imperial Beach 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 Imperial Beach peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month 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 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | High |
| 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 | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Imperial Beach 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 Imperial Beach is worst in October — around 33 µg/m³ PM2.5 (moderate), about 5.4× the cleanest month (May, 6 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) | 11 | 11 | 10 | 9 | 6 | 9 | 8 | 9 | 16 | 33 | 13 | 17 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 11 | Good |
| Mar | 10 | Good |
| Apr | 9 | Good |
| May | 6 | Good |
| Jun | 9 | Good |
| Jul | 8 | Good |
| Aug | 9 | Good |
| Sep | 16 | Moderate |
| Oct | 33 | Moderate |
| Nov | 13 | Moderate |
| Dec | 17 | Moderate |
Where is Imperial Beach?
Imperial Beach sits at 32.6°N, 117.1°W, 20 ft above sea level, in United States. The nearest listed city is Chula Vista, 4.3 mi away.
Topography around Imperial Beach
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Imperial Beach.
Within 2 miles, the terrain around Imperial Beach has only modest variations in elevation — a maximum elevation change of 105 ft around an average of 16 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,152 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,450 ft.
The land around Imperial Beach is covered by artificial surfaces (36%) and water (35%) within 2 miles, water (43%) and artificial surfaces (35%) within 10 miles, and water (35%) and shrubs (24%) 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 Imperial Beach (32.5839°, -117.1131°, elevation 20 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.