Truckee weather in February
In February, Truckee sees average daytime highs of 40°F and overnight lows near 24°F, with 6.6 in of precipitation across 11.7 wet days and about 10.5 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 40°F through the month. The sky is clear or mostly clear about 29% of the time in February, and the air most often feels dry.
Daylight stretches from about 10 hours at the start of February to 11 hours by month's end. Set against the rest of the year, February is Truckee's 12th-clearest and 3rd-windiest month. For the whole year in context, see Truckee's year-round climate.
- Daytime high
- 40°
- 10th warmest
- Overnight low
- 24°
- 3rd coldest
- Precipitation
- 6.6 in
- 11.7 wet days
- Daylight
- 10 h 30 min
- 7:01 AM – 5:29 PM
- Cloud cover
- 61%
- 12th clearest
- Wind
- 6 mph
- 3rd windiest
- Solar energy
- 3.54 kWh/m²
- Travel score
- 0.0
- out of 10
Truckee is town in Nevada County, California, United States.
- Density
- 187/km²
- people per km²
- Founded
- 1993
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in February
Day-to-day highs hold fairly steady near 40°F through the month.
A typical February day in Truckee reaches about 40°F in the afternoon and slips back to 24°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 49°F. Set against its neighbours, February runs about 1°F warmer than January and about 4°F cooler than March.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 40 |
| Avg low (°F) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 39 | 24 |
| 2 | 39 | 24 |
| 3 | 39 | 24 |
| 4 | 40 | 24 |
| 5 | 40 | 24 |
| 6 | 40 | 24 |
| 7 | 40 | 24 |
| 8 | 40 | 24 |
| 9 | 40 | 24 |
| 10 | 40 | 24 |
| 11 | 40 | 24 |
| 12 | 40 | 24 |
| 13 | 40 | 24 |
| 14 | 40 | 24 |
| 15 | 39 | 24 |
| 16 | 39 | 24 |
| 17 | 39 | 24 |
| 18 | 39 | 24 |
| 19 | 39 | 24 |
| 20 | 39 | 24 |
| 21 | 39 | 24 |
| 22 | 39 | 24 |
| 23 | 39 | 24 |
| 24 | 39 | 24 |
| 25 | 40 | 24 |
| 26 | 40 | 24 |
| 27 | 40 | 24 |
| 28 | 40 | 24 |
How February really feels in Truckee
Once humidity and wind are folded in, February averages 0 days that feel above 90°F and 28 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in February is cold — wind chill drags the overnight "feels like" below the raw low.
Truckee weather by month
How February compares with the rest of the year at a glance. February is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 38° / 24° | 7.0 | 11.6 | 11.2 | 9.5 | 0.0 |
| Feb | 40° / 24° | 6.6 | 11.7 | 11.5 | 10.5 | 0.0 |
| Mar | 43° / 26° | 6.2 | 12 | 11.6 | 11.7 | 0.5 |
| Apr | 47° / 29° | 3.5 | 9.9 | 8.4 | 13 | 1.6 |
| May | 57° / 35° | 2.6 | 9.3 | 4.4 | 14.1 | 4.2 |
| Jun | 69° / 44° | 1.0 | 4.8 | 0.9 | 14.7 | 7.7 |
| Jul | 78° / 52° | 0.5 | 3.2 | 0 | 14.5 | 8.6 |
| Aug | 77° / 52° | 0.5 | 3.2 | 0 | 13.5 | 8.7 |
| Sep | 71° / 46° | 0.7 | 3.7 | 0.4 | 12.3 | 8.2 |
| Oct | 60° / 37° | 2.0 | 5.2 | 2.2 | 11 | 5.7 |
| Nov | 46° / 28° | 3.9 | 8.5 | 7.5 | 9.8 | 1.3 |
| Dec | 37° / 24° | 7.0 | 11.6 | 11.1 | 9.3 | 0.0 |
Cloud cover in February
The sky is clear or mostly clear about 29% of the time in February, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 11% of February, with mostly cloudy or overcast conditions the remaining 60%.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 40 | 39 | 39 | 39 | 39 | 39 | 40 | 39 | 39 | 39 | 40 | 40 |
| Cloudier (%) | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 60 | 61 | 61 | 61 | 61 | 61 | 60 | 61 | 61 | 61 | 60 | 60 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 41 | 59 |
| 2 | 41 | 59 |
| 3 | 41 | 59 |
| 4 | 41 | 59 |
| 5 | 41 | 59 |
| 6 | 40 | 60 |
| 7 | 40 | 60 |
| 8 | 40 | 60 |
| 9 | 40 | 60 |
| 10 | 40 | 60 |
| 11 | 40 | 60 |
| 12 | 40 | 60 |
| 13 | 39 | 61 |
| 14 | 39 | 61 |
| 15 | 39 | 61 |
| 16 | 39 | 61 |
| 17 | 40 | 60 |
| 18 | 39 | 61 |
| 19 | 39 | 61 |
| 20 | 39 | 61 |
| 21 | 39 | 61 |
| 22 | 39 | 61 |
| 23 | 40 | 60 |
| 24 | 39 | 61 |
| 25 | 39 | 61 |
| 26 | 39 | 61 |
| 27 | 40 | 60 |
| 28 | 40 | 60 |
Chance of precipitation in February
Truckee gets around 6.6 in of rain and snow over 11.7 wet days in February. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 42% and peaks near 45% on the wettest days, and about 12 days bring snow. The odds climb toward the end of the month.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 36 | 36 | 36 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 43 | 43 |
| Snow chance (%) | 34 | 34 | 34 | 35 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 44 | 44 | 44 | 43 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 36 | 34 |
| 2 | 36 | 34 |
| 3 | 36 | 34 |
| 4 | 36 | 35 |
| 5 | 36 | 35 |
| 6 | 37 | 36 |
| 7 | 38 | 37 |
| 8 | 39 | 38 |
| 9 | 40 | 39 |
| 10 | 41 | 40 |
| 11 | 42 | 41 |
| 12 | 43 | 42 |
| 13 | 43 | 43 |
| 14 | 44 | 43 |
| 15 | 44 | 43 |
| 16 | 44 | 43 |
| 17 | 44 | 44 |
| 18 | 45 | 44 |
| 19 | 45 | 44 |
| 20 | 45 | 44 |
| 21 | 45 | 44 |
| 22 | 45 | 45 |
| 23 | 45 | 45 |
| 24 | 45 | 45 |
| 25 | 45 | 44 |
| 26 | 44 | 44 |
| 27 | 43 | 44 |
| 28 | 43 | 43 |
Humidity in February
Most of February feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, February lands in the dry band about 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
Wind in February
Winds average 6 mph in February.
Across February, daily wind ranges from about 5 mph on the calmest days to 6 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 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 |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
Sunrise & sunset in February
Daylight runs from about 10 hours at the start of February to 11 hours by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 60 minutes over February. Sunrise moves from 7:15 AM to 6:44 AM, and sunset from 5:13 PM to 5:44 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.0 | 10.0 | 10.0 | 10.1 | 10.1 | 10.1 | 10.2 | 10.2 | 10.2 | 10.3 | 10.3 | 10.3 | 10.4 | 10.4 | 10.5 | 10.5 | 10.5 | 10.6 | 10.6 | 10.7 | 10.7 | 10.7 | 10.8 | 10.8 | 10.9 | 10.9 | 10.9 | 11.0 |
| Sunrise (AM) | 7:15 | 7:15 | 7:14 | 7:13 | 7:12 | 7:11 | 7:10 | 7:09 | 7:08 | 7:07 | 7:06 | 7:05 | 7:04 | 7:03 | 7:01 | 7:00 | 6:59 | 6:58 | 6:57 | 6:55 | 6:54 | 6:53 | 6:51 | 6:50 | 6:49 | 6:47 | 6:46 | 6:44 |
| Sunset (PM) | 5:13 | 5:14 | 5:15 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 | 5:23 | 5:25 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:32 | 5:33 | 5:34 | 5:35 | 5:36 | 5:37 | 5:38 | 5:39 | 5:41 | 5:42 | 5:43 | 5:44 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.0 | 7:15 | 5:13 |
| 2 | 10.0 | 7:15 | 5:14 |
| 3 | 10.0 | 7:14 | 5:15 |
| 4 | 10.1 | 7:13 | 5:17 |
| 5 | 10.1 | 7:12 | 5:18 |
| 6 | 10.1 | 7:11 | 5:19 |
| 7 | 10.2 | 7:10 | 5:20 |
| 8 | 10.2 | 7:09 | 5:21 |
| 9 | 10.2 | 7:08 | 5:22 |
| 10 | 10.3 | 7:07 | 5:23 |
| 11 | 10.3 | 7:06 | 5:25 |
| 12 | 10.3 | 7:05 | 5:26 |
| 13 | 10.4 | 7:04 | 5:27 |
| 14 | 10.4 | 7:03 | 5:28 |
| 15 | 10.5 | 7:01 | 5:29 |
| 16 | 10.5 | 7:00 | 5:30 |
| 17 | 10.5 | 6:59 | 5:32 |
| 18 | 10.6 | 6:58 | 5:33 |
| 19 | 10.6 | 6:57 | 5:34 |
| 20 | 10.7 | 6:55 | 5:35 |
| 21 | 10.7 | 6:54 | 5:36 |
| 22 | 10.7 | 6:53 | 5:37 |
| 23 | 10.8 | 6:51 | 5:38 |
| 24 | 10.8 | 6:50 | 5:39 |
| 25 | 10.9 | 6:49 | 5:41 |
| 26 | 10.9 | 6:47 | 5:42 |
| 27 | 10.9 | 6:46 | 5:43 |
| 28 | 11.0 | 6:44 | 5:44 |
Solar energy in February
Average shortwave solar energy reaching the ground each day in February, about 3.54 kWh/m².
For context, solar energy here swings from a low near 2.26 kWh/m² to a high of 8.21 kWh/m² in June across the year — February's 3.54 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.0 | 3.1 | 3.1 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | 3.3 | 3.4 | 3.4 | 3.4 | 3.5 | 3.5 | 3.5 | 3.6 | 3.6 | 3.6 | 3.7 | 3.7 | 3.8 | 3.8 | 3.9 | 3.9 | 4.0 | 4.0 | 4.1 | 4.2 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.0 | Moderate |
| 2 | 3.1 | Moderate |
| 3 | 3.1 | Moderate |
| 4 | 3.1 | Moderate |
| 5 | 3.2 | Moderate |
| 6 | 3.2 | Moderate |
| 7 | 3.3 | Moderate |
| 8 | 3.3 | Moderate |
| 9 | 3.3 | Moderate |
| 10 | 3.4 | Moderate |
| 11 | 3.4 | Moderate |
| 12 | 3.4 | Moderate |
| 13 | 3.5 | Moderate |
| 14 | 3.5 | Moderate |
| 15 | 3.5 | Moderate |
| 16 | 3.6 | Moderate |
| 17 | 3.6 | Moderate |
| 18 | 3.6 | Moderate |
| 19 | 3.7 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.8 | Moderate |
| 22 | 3.8 | Moderate |
| 23 | 3.9 | Moderate |
| 24 | 3.9 | Moderate |
| 25 | 4.0 | Moderate |
| 26 | 4.0 | Bright |
| 27 | 4.1 | Bright |
| 28 | 4.2 | Bright |
Hazard calendar for Truckee
In February, Truckee sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Truckee's rainy season runs November–April, when most of the year's rain falls.
Is February a good time to visit Truckee?
Our two travel scores rate February for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
February is a weaker month for outdoor sightseeing in Truckee.
What to pack for Truckee in February
From February's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In February, Truckee sees daytime highs around 40°F and nights near 24°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 12 days see rain.
UV index in Truckee in February
Clear-sky midday UV in February peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Truckee peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 8 | 10 | 11 | 11 | 10 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Very high | High | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 7 | High |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Truckee in February
Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.
Air quality in Truckee is worst in August — around 85 µg/m³ PM2.5 (unhealthy), about 16.6× the cleanest month (December, 5 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) | 6 | 8 | 9 | 9 | 9 | 14 | 45 | 85 | 34 | 11 | 6 | 5 |
| Level | Good | Good | Good | Good | Good | Moderate | Poor | Unhealthy | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 9 | Good |
| May | 9 | Good |
| Jun | 14 | Moderate |
| Jul | 45 | Poor |
| Aug | 85 | Unhealthy |
| Sep | 34 | Moderate |
| Oct | 11 | Good |
| Nov | 6 | Good |
| Dec | 5 | Good |
Where is Truckee?
Truckee sits at 39.3°N, 120.2°W, 5,817 ft above sea level, in United States. The nearest listed city is Reno, 24 mi away.
Topography around Truckee
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Truckee.
Within 2 miles, the terrain around Truckee has significant variations in elevation — a maximum elevation change of 994 ft around an average of 6,066 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,799 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,062 ft.
The land around Truckee is covered by trees (75%) within 2 miles, trees (85%) within 10 miles, and trees (60%) and grassland (30%) 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 Truckee (39.328°, -120.1833°, elevation 5,817 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).