Lake Arrowhead weather in September: Lake Arrowhead, California: normal highs, lows, rain and records for September
Lake Arrowhead in September has a normal high of 74°F and a normal low of 52°F, a daily mean of 63°F, falling from 79°F on the 1st to 69°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.31 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 8 mm of precipitation in September.
- NOAA stationLake Arrowhead
- Station IDUSC00044671
- Location34.25°N 117.19°W
- Elevation5,205 ft (1,587 m)
- From the centerunder 1 mile
- Population (census place)10,746
- Jan 44° 29°
- Feb 45° 30°
- Mar 52° 32°
- Apr 60° 36°
- May 67° 41°
- Jun 76° 49°
- Jul 81° 57°
- Aug 82° 57°
- Sep 74° 52°
- Oct 63° 43°
- Nov 52° 34°
- Dec 43° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lake Arrowhead in September?
The normal high is 74°F and the normal low 52°F, for a daily mean of 63.0°F. September is 6.4°F cooler than August and 10.1°F warmer than October. September is the 3rd warmest month of the year in Lake Arrowhead and the 9th wettest. Across the month the normal high falls 10°F, from 79°F on September 1 to 69°F on September 30. From one year to the next September's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 61°F and 65°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 3%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 79°F | 55°F | 2% | 2% |
| September 8 | 77°F | 54°F | 2% | 2% |
| September 15 | 75°F | 52°F | 2% | 2% |
| September 22 | 72°F | 50°F | 3% | 2% |
| September 30 | 69°F | 48°F | 3% | 3% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 79°F | 55°F | 2% | 2% | 13 h |
| September 2 | 79°F | 55°F | 2% | 2% | 12 h 50 min |
| September 3 | 79°F | 55°F | 2% | 2% | 12 h 50 min |
| September 4 | 78°F | 55°F | 2% | 2% | 12 h 50 min |
| September 5 | 78°F | 55°F | 2% | 2% | 12 h 50 min |
| September 6 | 78°F | 54°F | 2% | 2% | 12 h 50 min |
| September 7 | 77°F | 54°F | 2% | 2% | 12 h 40 min |
| September 8 | 77°F | 54°F | 2% | 2% | 12 h 40 min |
| September 9 | 77°F | 54°F | 2% | 2% | 12 h 40 min |
| September 10 | 76°F | 54°F | 2% | 2% | 12 h 40 min |
| September 11 | 76°F | 53°F | 2% | 2% | 12 h 30 min |
| September 12 | 76°F | 53°F | 2% | 2% | 12 h 30 min |
| September 13 | 75°F | 53°F | 2% | 2% | 12 h 30 min |
| September 14 | 75°F | 53°F | 2% | 2% | 12 h 30 min |
| September 15 | 75°F | 52°F | 2% | 2% | 12 h 30 min |
| September 16 | 74°F | 52°F | 2% | 2% | 12 h 20 min |
| September 17 | 74°F | 52°F | 2% | 2% | 12 h 20 min |
| September 18 | 73°F | 51°F | 3% | 2% | 12 h 20 min |
| September 19 | 73°F | 51°F | 3% | 2% | 12 h 20 min |
| September 20 | 73°F | 51°F | 3% | 2% | 12 h 20 min |
| September 21 | 72°F | 51°F | 3% | 2% | 12 h 10 min |
| September 22 | 72°F | 50°F | 3% | 2% | 12 h 10 min |
| September 23 | 71°F | 50°F | 3% | 2% | 12 h 10 min |
| September 24 | 71°F | 50°F | 3% | 2% | 12 h 10 min |
| September 25 | 71°F | 49°F | 3% | 2% | 12 h 10 min |
| September 26 | 70°F | 49°F | 3% | 3% | 12 h |
| September 27 | 70°F | 49°F | 3% | 3% | 12 h |
| September 28 | 69°F | 49°F | 3% | 3% | 12 h |
| September 29 | 69°F | 48°F | 3% | 3% | 12 h |
| September 30 | 69°F | 48°F | 3% | 3% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 52°FSeptember average
- Precipitation
- 0.31 inmonth total
- Days with precipitation
- 10.01 inch or more
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 11
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00044671; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lake Arrowhead in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 29 (3%). In all, 0.31 in falls on 1 days of a normal September.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00044671.
What are the records for September in Lake Arrowhead?
The warmest September temperature on this station's record (since 1941) is 98°F, on September 1, 1950; the coldest is 30°F, on September 26, 1948. The wettest September brought 9.27 in (1976).
Source: records: ACIS, station USC00044671. Records and recent months use complete months only.
How does September in Lake Arrowhead compare across California?
Across the 219 places PlainClimate covers in California, September normal highs run from 64°F in Eureka to 104°F in Brawley; Lake Arrowhead's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lake Arrowhead in August82°F by day, 57°F at night
- Lake Arrowhead in October63°F by day, 43°F at night
- Lake Arrowhead through the yearEvery month, frost dates, records and recent years
- California in SeptemberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Septembernormal high 104°F