Windsor in Fall
In fall (September, October and November), Windsor sees average daytime highs around 73°F and overnight lows near 50°F, with 4.4 in of rain over about 10 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 83°F in early September to 59°F by late November. The sky is clear or mostly clear about 66% of the time across fall, and the air most often feels dry.
Fall is Windsor's 2nd-best season to visit on our travel score. For the whole year in context, see Windsor's year-round climate.
- Avg daytime high
- 73°F
- 2nd-warmest season
- Avg overnight low
- 50°F
- Rainfall
- 4.4 in
- 10 wet days
- Avg wind
- 4 mph
- Travel score
- 7.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Windsor in Fall
Over the season highs ease from about 83°F in early September to 59°F by late November.
A typical fall day in Windsor reaches about 73°F and drops to 50°F overnight. The warmest of the three months is September, the coolest November.
Windsor weather by month
How the three fall months (September, October and November) 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 | 57° / 40° | 5.7 | 10.3 | 9.6 | 4.0 |
| Feb | 60° / 42° | 5.8 | 9.3 | 10.5 | 4.7 |
| Mar | 63° / 44° | 4.4 | 9.5 | 11.7 | 5.7 |
| Apr | 67° / 46° | 1.9 | 5.6 | 13 | 7.0 |
| May | 73° / 51° | 1.1 | 3.6 | 14.1 | 8.2 |
| Jun | 80° / 55° | 0.3 | 1.2 | 14.6 | 8.5 |
| Jul | 83° / 57° | 0.0 | 0.1 | 14.4 | 7.8 |
| Aug | 83° / 57° | 0.0 | 0.2 | 13.5 | 7.8 |
| Sep | 81° / 55° | 0.1 | 0.6 | 12.3 | 8.6 |
| Oct | 74° / 50° | 1.4 | 3.2 | 11 | 8.5 |
| Nov | 63° / 44° | 3.0 | 6.2 | 9.9 | 6.2 |
| Dec | 56° / 39° | 5.9 | 10.1 | 9.4 | 3.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 66% of the time across fall.
Chance of precipitation in Fall
Windsor gets around 4.4 in of rain over 10 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 4 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 54 min in early September to 9 h 30 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.3 kWh/m².
Hazard calendar for Windsor
In fall, Windsor overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Windsor's rainy season runs November–March, when most of the year's rain falls.
Is fall a good time to visit Windsor?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit Windsor for general sightseeing.
What to pack for Windsor in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Windsor sees daytime highs around 73°F and nights near 50°F. Pack light clothes. Worth having: a warm layer and sun protection. About 10 days see rain.
Sea temperature near Windsor in Fall
The nearest coast averages about 55°F across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 21 mi away) is warmest in September at about 55°F and coldest in May near 51°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 53 | 53 | 53 | 51 | 51 | 51 | 53 | 54 | 55 | 55 | 54 | 53 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 53 | Bracing |
| Feb | 53 | Bracing |
| Mar | 53 | Bracing |
| Apr | 51 | Bracing |
| May | 51 | Bracing |
| Jun | 51 | Bracing |
| Jul | 53 | Bracing |
| Aug | 54 | Bracing |
| Sep | 55 | Bracing |
| Oct | 55 | Bracing |
| Nov | 54 | Bracing |
| Dec | 53 | Bracing |
UV index in Windsor in Fall
Clear-sky midday UV across fall 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 Windsor peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 | 4 | 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 | 4 | 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 Windsor in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Windsor is worst in September — around 24 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (June, 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) | 8 | 9 | 9 | 7 | 7 | 6 | 9 | 17 | 24 | 16 | 9 | 7 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 9 | Good |
| Apr | 7 | Good |
| May | 7 | Good |
| Jun | 6 | Good |
| Jul | 9 | Good |
| Aug | 17 | Moderate |
| Sep | 24 | Moderate |
| Oct | 16 | Moderate |
| Nov | 9 | Good |
| Dec | 7 | Good |
Where is Windsor?
Windsor sits at 38.5°N, 122.8°W, 118 ft above sea level, in United States. The nearest listed city is Santa Rosa, 9.3 mi away.
Topography around Windsor
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Windsor.
Within 2 miles, the terrain around Windsor has only modest variations in elevation — a maximum elevation change of 476 ft around an average of 144 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 1,969 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,266 ft.
The land around Windsor is covered by trees (35%), artificial surfaces (28%) and grassland (26%) within 2 miles, trees (57%) and grassland (27%) within 10 miles, and trees (42%), grassland (27%) and water (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 Windsor (38.5471°, -122.8164°, elevation 118 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.