San Bernardino in september: average Weather, Temperature and Climate
Weather in San Bernardino in september 2025
The weather in San Bernardino in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
perfect weather UV index: 8
Weather at 6am
74°F
Clear/Sunny
89% of time
8%
3%
1%
Weather at 12pm
94°F
Clear/Sunny
90% of time
7%
3%
1%
Weather at 6pm
79°F
Clear/Sunny
93% of time
6%
2%
1%
Weather at 3am
67°F
91%
8%
2%
1%
Evolution of daily average temperature and precipitation in San Bernardino in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in San Bernardino in september.
The climate of San Bernardino in september is perfect
The weather in september in San Bernardino is dry ; it never rains.
The climate is very warm in that area the month of september. The thermometer averaged maximum of 94°F. In the morning the temperature drops to 74°F. Thus, the mean temperature average on this month of september in San Bernardino is 83°F. Note that seasonal normals in contrast with those observed in San Bernardino in september with a maximum record of 113°F in 2020 and a minimum record of 50°F in 2009. You can plan to have about 25 days with temperatures above 86°F, or 83 of time.
On average, in San Bernardino, the days of september last 12:22. The sun rises at 05:33 and sunset is at 17:55.
With ideal weather conditions, the month of september is advisable to go there.
Seasonal average climate and temperature of San Bernardino in september
Check below seasonal norms These statistics are generated from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 83°F | ||||
| Highest temperature | 94°F | ||||
| Lowest temperature | 74°F | ||||
| Highest record temperature | 113°F (2020) | ||||
| Lowest record temperature | 50°F (2009) | ||||
| Number of days at +86°F | 25 day(s) (83%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 15km/h | ||||
| Wind temperature | 74°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 0.2in | ||||
| Record daily rainfall | 0.6in (2019) | ||||
| Other climate data | |||||
| Humidity | 42% | ||||
| Visibility | 9.96km | ||||
| Cloud cover | 5% | ||||
| UV index | 8 | ||||
| Daily sunshine hours | 13 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:33 | ||||
| Time of sunset | 17:55 | ||||
| Length of day | 12:22 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last september?
Here is the day by day recorded weather in San Bernardino in september 2024:
74°F to 99°F
76°F to 101°F
74°F to 101°F
76°F to 103°F
81°F to 106°F
83°F to 108°F
85°F to 104°F
85°F to 103°F
83°F to 104°F
79°F to 99°F
72°F to 90°F
63°F to 86°F
59°F to 85°F
61°F to 88°F
63°F to 83°F
59°F to 72°F
52°F to 70°F
58°F to 68°F
59°F to 67°F
56°F to 68°F
59°F to 77°F
65°F to 92°F
72°F to 97°F
72°F to 95°F
70°F to 94°F
68°F to 92°F
68°F to 92°F
68°F to 92°F
70°F to 94°F
76°F to 99°F
Map: other cities in California in september
Cities near San Bernardino:
| San Bernardino National Forest in september | perfect weather |
| Temecula in september | perfect weather |
| Angeles National Forest in september | perfect weather |
| Palm Springs in september | perfect weather |
| Newport Beach in september | perfect weather |
| San Clemente in september | perfect weather |
| Huntington Beach in september | perfect weather |
| Los Angeles in september | perfect weather |
| Hollywood in september | perfect weather |
| Oceanside in september | perfect weather |
| Cleveland National Forest in september | perfect weather |
| Carlsbad in september | perfect weather |
Click over cities on the map for information about the weather in september.
San Bernardino
perfect weather
good
tolerable
bad
very bad
Weather data for San Bernardino in september:
Weather data for San Bernardino for september are derived from an average of the weather forecast since 2009 in San Bernardino. There is a margin of error and these forecasts are to be considered as general information only. The weather in San Bernardino can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to San Bernardino.