Atwater in Fall
In fall (September, October and November), Atwater sees average daytime highs around 79°F and overnight lows near 55°F, with 2.4 in of rain over about 8 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 93°F in early September to 62°F by late November. The sky is clear or mostly clear about 72% of the time across fall, and the air most often feels dry.
Fall is Atwater's 2nd-best season to visit on our travel score. For the whole year in context, see Atwater's year-round climate.
- Avg daytime high
- 79°F
- 2nd-warmest season
- Avg overnight low
- 55°F
- Rainfall
- 2.4 in
- 8 wet days
- Avg wind
- 5 mph
- Travel score
- 6.9
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Atwater in Fall
Over the season highs ease from about 93°F in early September to 62°F by late November.
A typical fall day in Atwater reaches about 79°F and drops to 55°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Atwater
Once humidity and wind are folded in, fall brings about 15 days that feel above 90°F and 0 that feel at or below 32°F.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Atwater 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 | 58° / 42° | 3.5 | 8.1 | 9.7 | 4.7 |
| Feb | 63° / 44° | 3.1 | 8.4 | 10.6 | 5.7 |
| Mar | 68° / 48° | 2.8 | 7.7 | 11.7 | 6.8 |
| Apr | 75° / 52° | 1.2 | 4.7 | 12.9 | 7.9 |
| May | 83° / 58° | 0.7 | 2.8 | 14 | 7.1 |
| Jun | 92° / 64° | 0.1 | 0.6 | 14.5 | 4.6 |
| Jul | 97° / 68° | 0.0 | 0.2 | 14.3 | 2.8 |
| Aug | 95° / 67° | 0.0 | 0.1 | 13.4 | 3.3 |
| Sep | 90° / 63° | 0.1 | 0.4 | 12.3 | 5.4 |
| Oct | 79° / 55° | 0.8 | 2.3 | 11 | 8.3 |
| Nov | 67° / 46° | 1.5 | 4.8 | 10 | 7.1 |
| Dec | 58° / 41° | 3.0 | 7.4 | 9.5 | 4.7 |
Cloud cover in Fall
The sky is clear or mostly clear about 72% of the time across fall.
Chance of precipitation in Fall
Atwater gets around 2.4 in of rain over 8 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 5 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early September to 9 h 36 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 4.6 kWh/m².
Is fall a good time to visit Atwater?
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 a reasonable time to visit Atwater for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Atwater in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Atwater sees daytime highs around 79°F and nights near 55°F. Pack light clothes and sun protection. Worth having: a warm layer. About 8 days see rain.
UV index in Atwater in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Atwater peaks around June 19 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 | 4 | 7 | 8 | 10 | 10 | 10 | 7 | 5 | 2 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Extreme | Very high | Very high | High | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 7 | High |
| Oct | 5 | High |
| Nov | 2 | Moderate |
| Dec | 2 | Moderate |
Air quality in Atwater 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 Atwater is worst in August — around 29 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 8 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) | 13 | 14 | 14 | 11 | 9 | 8 | 15 | 29 | 22 | 17 | 15 | 12 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 14 | Moderate |
| Mar | 14 | Moderate |
| Apr | 11 | Good |
| May | 9 | Good |
| Jun | 8 | Good |
| Jul | 15 | Moderate |
| Aug | 29 | Moderate |
| Sep | 22 | Moderate |
| Oct | 17 | Moderate |
| Nov | 15 | Moderate |
| Dec | 12 | Moderate |
Where is Atwater?
Atwater sits at 37.3°N, 120.6°W, 151 ft above sea level, in United States. The nearest listed city is Merced, 7.5 mi away.
Topography around Atwater
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Atwater.
Within 2 miles, the terrain around Atwater has only modest variations in elevation — a maximum elevation change of 56 ft around an average of 154 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 341 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,919 ft.
The land around Atwater is covered by artificial surfaces (39%), cropland (23%) and trees (22%) within 2 miles, cropland (32%), trees (29%) and grassland (28%) within 10 miles, and grassland (47%) and trees (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 Atwater (37.3477°, -120.6091°, elevation 151 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.