Sun Valley, Nevada Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
Sun Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——84°55°—
- ThursdayJun 4Clear——86°55°+2°
- FridayJun 5Overcast——90°59°+4°
- SaturdayJun 6Overcast——80°58°-10°
- SundayJun 7Overcast——72°48°-8°
- MondayJun 8Overcast——78°52°+6°
- TuesdayJun 9Overcast11%—74°54°-4°
Ozone at AQI 78 now. AQI flat over the last 6 hours (within ±3 points). With UV 11 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 79 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 78 now. With UV 11 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 79 by mid-afternoon.
- Present
- AQI 78
- UV peak
- 10.7 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 79
PM × Wind × Precip
PM2.5/PM10 ratio 0.54 with 13 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.54
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- transport
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 5:53 AM
- Moonset
- 3:04 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Sun Valley at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Sun Valley's warmest month is July (~77°F mean) and its coldest is December (~36°F). Rainfall peaks in January (1.3 inches) and bottoms out in August (0.2 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 37° | 1.3″ | 3 |
| February | 40° | 1.0″ | 3 |
| March | 45° | 0.9″ | 2 |
| April | 50° | 0.5″ | 2 |
| May | 59° | 0.6″ | 2 |
| June | 68° | 0.5″ | 1 |
| July | 77° | 0.3″ | 1 |
| August | 75° | 0.2″ | 1 |
| September | 68° | 0.2″ | 1 |
| October | 55° | 0.6″ | 2 |
| November | 44° | 0.7″ | 2 |
| December | 36° | 1.2″ | 3 |
Regional context
Sun Valley sits within a hot-summer Mediterranean climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Reno, NV, Sparks, NV, Carson City, NV, Fernley, NV, Spanish Springs, NV.
Frequently asked
- When does it freeze in Sun Valley?
- Sun Valley's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Sun Valley?
- January is the wettest month with about 1.3 inches of rain on average; the city receives roughly 8 inches annually.
- What is the warmest month in Sun Valley?
- July is typically warmest, averaging about 77°F.
- What is the coldest month in Sun Valley?
- December is typically coldest, averaging about 36°F.
- When can I start a vegetable garden in Sun Valley?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Sun Valley get?
- Sun Valley averages about 23 rainy days per year.
- What hardiness zone is Sun Valley?
- Sun Valley's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Sun Valley, Nevada sits in a hot-summer Mediterranean climate zone. January means hover near 37°F while July averages 77°F — a 40°F seasonal swing.
Across the year, Sun Valley receives about 8 inches of precipitation spread over roughly 23 rainy days.
The rhythm of the year is set by latitude (39.6°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.