Coeur d'Alene weather in September: Coeur d'Alene, Idaho: normal highs, lows, rain and records for September
Coeur d'Alene in September has a normal high of 74°F and a normal low of 48°F, a daily mean of 61°F, falling from 79°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 6 days in a normal September, 0.81 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 9°C, 21 mm of precipitation in September.
- NOAA stationCoeur D'alene
- Station IDUSC00101956
- Location47.68°N 116.80°W
- Elevation2,133 ft (650 m)
- From the center1 miles
- Population57,355
- Jan 36° 26°
- Feb 41° 27°
- Mar 48° 31°
- Apr 56° 37°
- May 66° 44°
- Jun 72° 51°
- Jul 83° 57°
- Aug 83° 56°
- Sep 74° 48°
- Oct 58° 39°
- Nov 44° 32°
- Dec 36° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Coeur d'Alene in September?
The normal high is 74°F and the normal low 48°F, for a daily mean of 61.0°F. September is 8.5°F cooler than August and 12.4°F warmer than October. September is the 4th warmest month of the year in Coeur d'Alene and the 10th wettest. Across the month the normal high falls 12°F, from 79°F on September 1 to 67°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 59°F and 63°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 79°F | 52°F | 15% | 8% |
| September 8 | 77°F | 51°F | 17% | 9% |
| September 15 | 74°F | 49°F | 20% | 11% |
| September 22 | 71°F | 46°F | 23% | 13% |
| September 30 | 67°F | 44°F | 27% | 15% |
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 | 52°F | 15% | 8% | 13 h 30 min |
| September 2 | 79°F | 52°F | 15% | 8% | 13 h 20 min |
| September 3 | 78°F | 52°F | 16% | 9% | 13 h 20 min |
| September 4 | 78°F | 52°F | 16% | 9% | 13 h 20 min |
| September 5 | 78°F | 51°F | 16% | 9% | 13 h 10 min |
| September 6 | 77°F | 51°F | 17% | 9% | 13 h 10 min |
| September 7 | 77°F | 51°F | 17% | 9% | 13 h 10 min |
| September 8 | 77°F | 51°F | 17% | 9% | 13 h |
| September 9 | 76°F | 50°F | 18% | 10% | 13 h |
| September 10 | 76°F | 50°F | 18% | 10% | 13 h |
| September 11 | 76°F | 50°F | 18% | 10% | 12 h 50 min |
| September 12 | 75°F | 50°F | 19% | 10% | 12 h 50 min |
| September 13 | 75°F | 49°F | 19% | 10% | 12 h 50 min |
| September 14 | 75°F | 49°F | 20% | 11% | 12 h 40 min |
| September 15 | 74°F | 49°F | 20% | 11% | 12 h 40 min |
| September 16 | 74°F | 48°F | 21% | 11% | 12 h 40 min |
| September 17 | 73°F | 48°F | 21% | 11% | 12 h 30 min |
| September 18 | 73°F | 48°F | 22% | 12% | 12 h 30 min |
| September 19 | 73°F | 47°F | 22% | 12% | 12 h 30 min |
| September 20 | 72°F | 47°F | 22% | 12% | 12 h 20 min |
| September 21 | 72°F | 47°F | 23% | 12% | 12 h 20 min |
| September 22 | 71°F | 46°F | 23% | 13% | 12 h 20 min |
| September 23 | 71°F | 46°F | 24% | 13% | 12 h 10 min |
| September 24 | 70°F | 46°F | 24% | 13% | 12 h 10 min |
| September 25 | 70°F | 45°F | 24% | 13% | 12 h 10 min |
| September 26 | 69°F | 45°F | 25% | 14% | 12 h |
| September 27 | 69°F | 45°F | 25% | 14% | 12 h |
| September 28 | 68°F | 44°F | 26% | 14% | 11 h 50 min |
| September 29 | 68°F | 44°F | 26% | 15% | 11 h 50 min |
| September 30 | 67°F | 44°F | 27% | 15% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 48°FSeptember average
- Precipitation
- 0.81 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 30 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 20
- Days at 80°F or more
- 9
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00101956; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Coeur d'Alene in September?
On a given September day the chance of 0.01 inch or more is 21% on average, highest around September 30 (27%). In all, 0.81 in falls on 6 days of a normal September.
In a normal September in Coeur d'Alene, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00101956.
What are the records for September in Coeur d'Alene?
The warmest September temperature on this station's record (since 1895) is 102°F, on September 1, 1967; the coldest is 17°F, on September 24, 1926. The wettest September brought 6.29 in (1927).
The September mean against the 1991-2020 normal of 61.0°F: 2022 65.2°F (+4.2), 2023 61.6°F (+0.6), 2024 65.1°F (+4.1), 2025 69.0°F (+8.0), 2026 60.1°F (−0.9). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 65.2°F | +4.2°F | 1.79 in |
| 2023 | 61.6°F | +0.6°F | – |
| 2024 | 65.1°F | +4.1°F | 1.09 in |
| 2025 | 69.0°F | +8.0°F | 0.44 in |
| 2026 | 60.1°F | −0.9°F | – |
Source: records: ACIS, station USC00101956; recent months: ACIS, station USC00101956. Records and recent months use complete months only.
How does September in Coeur d'Alene compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, September normal highs run from 59°F in Mullan to 86°F in Glenns Ferry; Coeur d'Alene's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Coeur d'Alene in August83°F by day, 56°F at night
- Coeur d'Alene in October58°F by day, 39°F at night
- Coeur d'Alene through the yearEvery month, frost dates, records and recent years
- Idaho in SeptemberThe statewide normal and the warmest and coolest places
- Glenns Ferry: Idaho's warmest Septembernormal high 86°F