San Jacinto in Fall
In fall (September, October and November), San Jacinto sees average daytime highs around 77°F and overnight lows near 54°F, with 1.9 in of rain over about 7 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 88°F in early September to 64°F by late November. The sky is clear or mostly clear about 74% of the time across fall, and the air most often feels dry.
Fall is San Jacinto's best season of the year to visit on our travel score. For the whole year in context, see San Jacinto's year-round climate.
- Avg daytime high
- 77°F
- 2nd-warmest season
- Avg overnight low
- 54°F
- Rainfall
- 1.9 in
- 7 wet days
- Avg wind
- 3 mph
- Travel score
- 7.7
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in San Jacinto in Fall
Over the season highs ease from about 88°F in early September to 64°F by late November.
A typical fall day in San Jacinto reaches about 77°F and drops to 54°F overnight. The warmest of the three months is September, the coolest November.
San Jacinto 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 | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 61° / 40° | 2.9 | 6.6 | 0.7 | 10 | 5.6 |
| Feb | 61° / 42° | 3.5 | 7.7 | 1 | 10.7 | 5.5 |
| Mar | 64° / 44° | 2.2 | 6.6 | 0.6 | 11.7 | 6.5 |
| Apr | 69° / 48° | 1.1 | 4.5 | 0.3 | 12.8 | 7.6 |
| May | 74° / 53° | 0.5 | 2.7 | 0 | 13.7 | 8.6 |
| Jun | 82° / 60° | 0.1 | 0.6 | 0 | 14.2 | 8.1 |
| Jul | 88° / 66° | 0.2 | 1.2 | 0 | 14 | 5.8 |
| Aug | 89° / 67° | 0.1 | 1 | 0 | 13.3 | 5.5 |
| Sep | 85° / 62° | 0.2 | 1 | 0 | 12.2 | 6.9 |
| Oct | 77° / 54° | 0.7 | 2.9 | 0 | 11.1 | 8.6 |
| Nov | 68° / 46° | 1.1 | 3.3 | 0.1 | 10.2 | 7.7 |
| Dec | 60° / 40° | 2.3 | 5.5 | 0.4 | 9.8 | 5.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 74% of the time across fall.
Chance of precipitation in Fall
San Jacinto gets around 1.9 in of rain over 7 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 3 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 42 min in early September to 9 h 54 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 5.0 kWh/m².
Is fall a good time to visit San Jacinto?
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 San Jacinto for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Jacinto in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, San Jacinto sees daytime highs around 77°F and nights near 54°F. Pack light clothes and sun protection. Worth having: a warm layer. About 7 days see rain.
UV index in San Jacinto in Fall
Clear-sky midday UV across fall averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Jacinto 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 — 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 | 9 | 11 | 11 | 11 | 9 | 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 | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in San Jacinto 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 San Jacinto is worst in September — around 40 µg/m³ PM2.5 (poor), about 5.4× the cleanest month (December, 7 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 | 11 | 10 | 8 | 19 | 12 | 20 | 40 | 10 | 8 | 7 |
| Level | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Poor | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 11 | Good |
| Apr | 10 | Good |
| May | 8 | Good |
| Jun | 19 | Moderate |
| Jul | 12 | Moderate |
| Aug | 20 | Moderate |
| Sep | 40 | Poor |
| Oct | 10 | Good |
| Nov | 8 | Good |
| Dec | 7 | Good |
Where is San Jacinto?
San Jacinto sits at 33.8°N, 117.0°W, 1,565 ft above sea level, in United States. The nearest listed city is Hemet, 2.5 mi away.
Topography around San Jacinto
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of San Jacinto.
Within 2 miles, the terrain around San Jacinto has only modest variations in elevation — a maximum elevation change of 522 ft around an average of 1,568 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,350 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,598 ft.
The land around San Jacinto is covered by artificial surfaces (50%) and grassland (23%) within 2 miles, shrubs (41%) and grassland (29%) within 10 miles, and shrubs (33%) 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 San Jacinto (33.7839°, -116.9586°, elevation 1,565 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.