Caldwell weather in September
In September, Caldwell sees average daytime highs of 81°F and overnight lows near 54°F, with 0.4 in of rain across 2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.
Highs ease over the month, from about 87°F in the first days to 76°F by the end. The sky is clear or mostly clear about 67% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Caldwell's 3rd-clearest and 11th-windiest month. For the whole year in context, see Caldwell's year-round climate.
- Daytime high
- 81°
- 4th warmest
- Overnight low
- 54°
- 9th coldest
- Rainfall
- 0.4 in
- 2 wet days
- Daylight
- 12 h 18 min
- 6:32 AM – 6:50 PM
- Cloud cover
- 30%
- 3rd clearest
- Wind
- 4 mph
- 11th windiest
- Solar energy
- 5.44 kWh/m²
- Travel score
- 7.7
- out of 10
Caldwell is city in and county seat of Canyon County, Idaho, United States.
- Density
- 898/km²
- people per km²
- Founded
- 1883
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 87°F in the first days to 76°F by the end.
A typical September day in Caldwell reaches about 81°F in the afternoon and slips back to 54°F overnight — a 28°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 92°F. Set against its neighbours, September runs about 11°F cooler than August and about 15°F warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 87 | 87 | 86 | 86 | 85 | 85 | 85 | 84 | 84 | 83 | 83 | 82 | 82 | 82 | 81 | 81 | 80 | 80 | 80 | 79 | 79 | 78 | 78 | 78 | 77 | 77 | 76 | 76 | 75 |
| Avg low (°F) | 58 | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 49 | 49 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 87 | 58 |
| 2 | 87 | 58 |
| 3 | 87 | 58 |
| 4 | 86 | 57 |
| 5 | 86 | 57 |
| 6 | 85 | 57 |
| 7 | 85 | 56 |
| 8 | 85 | 56 |
| 9 | 84 | 56 |
| 10 | 84 | 55 |
| 11 | 83 | 55 |
| 12 | 83 | 55 |
| 13 | 82 | 54 |
| 14 | 82 | 54 |
| 15 | 82 | 54 |
| 16 | 81 | 53 |
| 17 | 81 | 53 |
| 18 | 80 | 53 |
| 19 | 80 | 53 |
| 20 | 80 | 52 |
| 21 | 79 | 52 |
| 22 | 79 | 52 |
| 23 | 78 | 51 |
| 24 | 78 | 51 |
| 25 | 78 | 51 |
| 26 | 77 | 50 |
| 27 | 77 | 50 |
| 28 | 76 | 50 |
| 29 | 76 | 49 |
| 30 | 75 | 49 |
How September really feels in Caldwell
Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Caldwell weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 41° / 27° | 1.5 | 8.7 | 3.7 | 9.1 | 0.1 |
| Feb | 48° / 30° | 1.0 | 7 | 2.1 | 10.2 | 1.7 |
| Mar | 58° / 37° | 1.2 | 8 | 0.5 | 11.6 | 4.4 |
| Apr | 65° / 42° | 1.0 | 6.2 | 0.1 | 13.2 | 6.4 |
| May | 75° / 50° | 1.0 | 5.7 | 0 | 14.5 | 7.6 |
| Jun | 83° / 57° | 0.5 | 3.1 | 0 | 15.2 | 6.8 |
| Jul | 94° / 64° | 0.1 | 0.7 | 0 | 14.9 | 3.7 |
| Aug | 92° / 62° | 0.1 | 0.9 | 0 | 13.8 | 4.3 |
| Sep | 81° / 54° | 0.4 | 2 | 0 | 12.3 | 7.7 |
| Oct | 66° / 43° | 0.7 | 4 | 0 | 10.8 | 7.1 |
| Nov | 50° / 34° | 1.1 | 7.4 | 1 | 9.5 | 2.5 |
| Dec | 40° / 27° | 1.7 | 9.3 | 3.5 | 8.8 | 0.1 |
Cloud cover in September
The sky is clear or mostly clear about 67% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 86 | 86 | 86 | 85 | 84 | 84 | 83 | 83 | 81 | 81 | 81 | 79 | 79 | 78 | 78 | 78 | 77 | 77 | 77 | 77 | 76 | 77 | 77 | 77 | 77 | 78 | 78 | 76 | 76 | 76 |
| Cloudier (%) | 14 | 14 | 14 | 15 | 16 | 16 | 17 | 17 | 19 | 19 | 19 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 24 | 24 | 24 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 86 | 14 |
| 2 | 86 | 14 |
| 3 | 86 | 14 |
| 4 | 85 | 15 |
| 5 | 84 | 16 |
| 6 | 84 | 16 |
| 7 | 83 | 17 |
| 8 | 83 | 17 |
| 9 | 81 | 19 |
| 10 | 81 | 19 |
| 11 | 81 | 19 |
| 12 | 79 | 21 |
| 13 | 79 | 21 |
| 14 | 78 | 22 |
| 15 | 78 | 22 |
| 16 | 78 | 22 |
| 17 | 77 | 23 |
| 18 | 77 | 23 |
| 19 | 77 | 23 |
| 20 | 77 | 23 |
| 21 | 76 | 24 |
| 22 | 77 | 23 |
| 23 | 77 | 23 |
| 24 | 77 | 23 |
| 25 | 77 | 23 |
| 26 | 78 | 22 |
| 27 | 78 | 22 |
| 28 | 76 | 24 |
| 29 | 76 | 24 |
| 30 | 76 | 24 |
Chance of precipitation in September
Caldwell gets around 0.4 in of rain over 2 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 6% and peaks near 8% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 |
| Rain chance (%) | |
|---|---|
| 1 | 5 |
| 2 | 5 |
| 3 | 5 |
| 4 | 5 |
| 5 | 5 |
| 6 | 5 |
| 7 | 6 |
| 8 | 6 |
| 9 | 6 |
| 10 | 6 |
| 11 | 6 |
| 12 | 6 |
| 13 | 6 |
| 14 | 6 |
| 15 | 6 |
| 16 | 6 |
| 17 | 7 |
| 18 | 7 |
| 19 | 7 |
| 20 | 7 |
| 21 | 7 |
| 22 | 7 |
| 23 | 7 |
| 24 | 7 |
| 25 | 8 |
| 26 | 8 |
| 27 | 8 |
| 28 | 8 |
| 29 | 8 |
| 30 | 8 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 98 | 98 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 98 | 99 | 99 | 99 | 99 | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 98 | 2 | 0 |
| 2 | 98 | 2 | 0 |
| 3 | 97 | 2 | 1 |
| 4 | 97 | 2 | 1 |
| 5 | 97 | 2 | 1 |
| 6 | 97 | 2 | 1 |
| 7 | 97 | 2 | 1 |
| 8 | 97 | 2 | 1 |
| 9 | 97 | 2 | 1 |
| 10 | 97 | 2 | 1 |
| 11 | 97 | 2 | 1 |
| 12 | 97 | 2 | 1 |
| 13 | 98 | 2 | 0 |
| 14 | 99 | 1 | 0 |
| 15 | 99 | 1 | 0 |
| 16 | 99 | 1 | 0 |
| 17 | 99 | 1 | 0 |
| 18 | 99 | 1 | 0 |
| 19 | 99 | 1 | 0 |
| 20 | 100 | 0 | 0 |
| 21 | 100 | 0 | 0 |
| 22 | 100 | 0 | 0 |
| 23 | 100 | 0 | 0 |
| 24 | 100 | 0 | 0 |
| 25 | 100 | 0 | 0 |
| 26 | 100 | 0 | 0 |
| 27 | 100 | 0 | 0 |
| 28 | 100 | 0 | 0 |
| 29 | 100 | 0 | 0 |
| 30 | 100 | 0 | 0 |
Wind in September
Winds average 4 mph in September.
Across September, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in September
Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 90 minutes over September. Sunrise moves from 6:15 AM to 6:49 AM, and sunset from 7:18 PM to 6:23 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.1 | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.6 | 11.6 |
| Sunrise (AM) | 6:15 | 6:16 | 6:17 | 6:18 | 6:19 | 6:21 | 6:22 | 6:23 | 6:24 | 6:25 | 6:26 | 6:28 | 6:29 | 6:30 | 6:31 | 6:32 | 6:33 | 6:35 | 6:36 | 6:37 | 6:38 | 6:39 | 6:40 | 6:42 | 6:43 | 6:44 | 6:45 | 6:46 | 6:48 | 6:49 |
| Sunset (PM) | 7:18 | 7:16 | 7:14 | 7:13 | 7:11 | 7:09 | 7:07 | 7:05 | 7:03 | 7:01 | 6:59 | 6:58 | 6:56 | 6:54 | 6:52 | 6:50 | 6:48 | 6:46 | 6:44 | 6:42 | 6:40 | 6:38 | 6:37 | 6:35 | 6:33 | 6:31 | 6:29 | 6:27 | 6:25 | 6:23 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.1 | 6:15 | 7:18 |
| 2 | 13.0 | 6:16 | 7:16 |
| 3 | 13.0 | 6:17 | 7:14 |
| 4 | 12.9 | 6:18 | 7:13 |
| 5 | 12.9 | 6:19 | 7:11 |
| 6 | 12.8 | 6:21 | 7:09 |
| 7 | 12.8 | 6:22 | 7:07 |
| 8 | 12.7 | 6:23 | 7:05 |
| 9 | 12.7 | 6:24 | 7:03 |
| 10 | 12.6 | 6:25 | 7:01 |
| 11 | 12.6 | 6:26 | 6:59 |
| 12 | 12.5 | 6:28 | 6:58 |
| 13 | 12.4 | 6:29 | 6:56 |
| 14 | 12.4 | 6:30 | 6:54 |
| 15 | 12.3 | 6:31 | 6:52 |
| 16 | 12.3 | 6:32 | 6:50 |
| 17 | 12.2 | 6:33 | 6:48 |
| 18 | 12.2 | 6:35 | 6:46 |
| 19 | 12.1 | 6:36 | 6:44 |
| 20 | 12.1 | 6:37 | 6:42 |
| 21 | 12.0 | 6:38 | 6:40 |
| 22 | 12.0 | 6:39 | 6:38 |
| 23 | 11.9 | 6:40 | 6:37 |
| 24 | 11.9 | 6:42 | 6:35 |
| 25 | 11.8 | 6:43 | 6:33 |
| 26 | 11.8 | 6:44 | 6:31 |
| 27 | 11.7 | 6:45 | 6:29 |
| 28 | 11.7 | 6:46 | 6:27 |
| 29 | 11.6 | 6:48 | 6:25 |
| 30 | 11.6 | 6:49 | 6:23 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.44 kWh/m².
For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 8.01 kWh/m² in July across the year — September's 5.44 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 5.9 | 5.8 | 5.8 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.0 | 5.0 | 4.9 | 4.8 | 4.8 | 4.7 | 4.7 | 4.6 | 4.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.1 | Intense |
| 5 | 6.1 | Intense |
| 6 | 6.0 | Intense |
| 7 | 6.0 | Bright |
| 8 | 5.9 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.6 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.2 | Bright |
| 20 | 5.2 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.0 | Bright |
| 23 | 5.0 | Bright |
| 24 | 4.9 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.8 | Bright |
| 27 | 4.7 | Bright |
| 28 | 4.7 | Bright |
| 29 | 4.6 | Bright |
| 30 | 4.5 | Bright |
Is September a good time to visit Caldwell?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Caldwell for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Caldwell in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Caldwell sees daytime highs around 81°F and nights near 54°F. Pack light clothes. Worth having: sun protection.
UV index in Caldwell in September
Clear-sky midday UV in September peaks 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 Caldwell peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 5 | 8 | 8 | 9 | 7 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Caldwell in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Caldwell is worst in August — around 31 µg/m³ PM2.5 (moderate), about 5.0× the cleanest month (December, 6 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) | 7 | 8 | 10 | 9 | 10 | 8 | 15 | 31 | 16 | 11 | 8 | 6 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 8 | Good |
| Mar | 10 | Good |
| Apr | 9 | Good |
| May | 10 | Good |
| Jun | 8 | Good |
| Jul | 15 | Moderate |
| Aug | 31 | Moderate |
| Sep | 16 | Moderate |
| Oct | 11 | Good |
| Nov | 8 | Good |
| Dec | 6 | Good |
Where is Caldwell?
Caldwell sits at 43.7°N, 116.7°W, 2,375 ft above sea level, in United States. The nearest listed city is Nampa, 11 mi away.
Topography around Caldwell
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Caldwell.
Within 2 miles, the terrain around Caldwell has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 2,385 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 620 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,283 ft.
The land around Caldwell is covered by artificial surfaces (37%) within 2 miles, cropland (48%) and grassland (21%) within 10 miles, and grassland (70%) 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 Caldwell (43.6629°, -116.6874°, elevation 2,375 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).