Clearlake in Spring
In spring (March, April and May), Clearlake sees average daytime highs around 65°F and overnight lows near 46°F, with 8.2 in of precipitation over about 22 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 57°F in early March to 75°F by late May. The sky is clear or mostly clear about 42% of the time across spring, and the air most often feels dry.
Spring is Clearlake's 3rd-best season to visit on our travel score. For the whole year in context, see Clearlake's year-round climate.
- Avg daytime high
- 65°F
- 3rd-warmest season
- Avg overnight low
- 46°F
- Precipitation
- 8.2 in
- 22 wet days
- Avg wind
- 5 mph
- Travel score
- 6.2
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Clearlake in Spring
Over the season highs climb from about 57°F in early March to 75°F by late May.
A typical spring day in Clearlake reaches about 65°F and drops to 46°F overnight. The warmest of the three months is May, the coolest March.
Clearlake weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 53° / 38° | 6.1 | 10.9 | 1.4 | 9.6 | 2.8 |
| Feb | 55° / 40° | 5.9 | 9.4 | 1.7 | 10.5 | 3.6 |
| Mar | 59° / 42° | 4.7 | 10.4 | 1.4 | 11.7 | 4.6 |
| Apr | 64° / 45° | 2.1 | 6.5 | 0.3 | 13 | 6.2 |
| May | 71° / 51° | 1.4 | 4.7 | 0 | 14.1 | 7.8 |
| Jun | 80° / 58° | 0.5 | 2.1 | 0 | 14.7 | 8.2 |
| Jul | 87° / 64° | 0.0 | 0.2 | 0 | 14.5 | 6.6 |
| Aug | 86° / 63° | 0.1 | 0.4 | 0 | 13.5 | 6.7 |
| Sep | 82° / 59° | 0.2 | 1 | 0 | 12.3 | 8.2 |
| Oct | 72° / 52° | 1.6 | 3.8 | 0 | 11 | 8.2 |
| Nov | 60° / 43° | 3.2 | 7.1 | 0.2 | 9.9 | 5.1 |
| Dec | 52° / 38° | 6.2 | 10.5 | 0.8 | 9.3 | 2.8 |
Cloud cover in Spring
The sky is clear or mostly clear about 42% of the time across spring.
Chance of precipitation in Spring
Clearlake gets around 8.2 in of rain and snow over 22 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 5 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 hours in early March to 14 h 30 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².
Hazard calendar for Clearlake
In spring, Clearlake overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Clearlake's rainy season runs November–March, when most of the year's rain falls.
Is spring a good time to visit Clearlake?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Clearlake for sightseeing.
What to pack for Clearlake in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Clearlake sees daytime highs around 65°F and nights near 46°F. Pack sun protection. Worth having: a warm layer and rain gear. About 22 days see rain.
UV index in Clearlake in Spring
Clear-sky midday UV across spring averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Clearlake peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 9 | 10 | 10 | 9 | 6 | 5 | 2 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme | Very high | High | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 9 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 5 | High |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Clearlake in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Clearlake is worst in September — around 31 µg/m³ PM2.5 (moderate), about 5.8× the cleanest month (June, 5 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) | 6 | 8 | 9 | 8 | 6 | 5 | 14 | 29 | 31 | 14 | 8 | 6 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 8 | Good |
| May | 6 | Good |
| Jun | 5 | Good |
| Jul | 14 | Moderate |
| Aug | 29 | Moderate |
| Sep | 31 | Moderate |
| Oct | 14 | Moderate |
| Nov | 8 | Good |
| Dec | 6 | Good |
Where is Clearlake?
Clearlake sits at 39.0°N, 122.6°W, 1,417 ft above sea level, in United States. The nearest listed city is Windsor, 30 mi away.
Topography around Clearlake
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Clearlake.
Within 2 miles, the terrain around Clearlake has significant variations in elevation — a maximum elevation change of 853 ft around an average of 1,493 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,409 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,982 ft.
The land around Clearlake is covered by trees (39%) and grassland (28%) within 2 miles, trees (52%) and grassland (38%) within 10 miles, and trees (52%) and grassland (30%) 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 Clearlake (38.9582°, -122.6264°, elevation 1,417 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.