Lander, Wyoming Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Lander weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——83°46°—
- ThursdayJun 4Overcast——83°57°0°
- FridayJun 5Clear——85°52°+2°
- SaturdayJun 6Overcast——91°59°+6°
- SundayJun 7Overcast28%—82°57°-9°
- MondayJun 8Overcast27%—84°52°+2°
- TuesdayJun 9Overcast——87°62°+3°
Ozone at AQI 48 now. AQI up 18 in the last 6 hours — air quality is degrading. With UV 0.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 8 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 48 now. With UV 0.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 8 by mid-afternoon.
- Present
- AQI 48
- UV peak
- 0.1 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 5.5 µg/m³, PM10 at 18.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.29
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:55 AM
- Moonset
- 3:11 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Lander at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: May 3 (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
Warm-season window is open
As of June 4, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Lander's warmest month is July (~72°F mean) and its coldest is January (~21°F). Rainfall peaks in May (2.7 inches) and bottoms out in January (0.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 21° | 0.5″ | 2 |
| February | 25° | 0.7″ | 2 |
| March | 36° | 1.3″ | 3 |
| April | 43° | 2.1″ | 5 |
| May | 53° | 2.7″ | 5 |
| June | 63° | 1.1″ | 3 |
| July | 72° | 0.6″ | 2 |
| August | 70° | 0.5″ | 1 |
| September | 60° | 1.0″ | 3 |
| October | 45° | 1.4″ | 3 |
| November | 32° | 0.8″ | 3 |
| December | 22° | 0.6″ | 2 |
Regional context
Lander's climate, per the NOAA NCEI 1991-2020 normals from the nearest reporting station, runs cold-winter and warm-summer. January means hover near 21°F while July climbs to 72°F — a 50°F seasonal swing typical of northern-tier latitudes. Annual precipitation totals about 13.2 inches spread across roughly 33 days with measurable rain or snow.
Precipitation runs summer-dominant here: May averages 2.7 inches across 5.0 days with measurable rain, driven mostly by warm-season storms and thunderstorm activity, while January drops to just 0.5 inches across 1.8 rainy days under drier cool-season air. That summer-storm-driven distribution puts Lander in a cohort with places like Boulder Flats, WY, Hudson, WY and Ethete, WY, all of which depend on warm-season convective activity for the bulk of their annual moisture.
The frost-sensitive growing window opens around late-May, when overnight lows reliably clear freezing for cool-season crops like kale, peas, spinach, and parsnips. Warm-soil crops — tomatoes, peppers, eggplant — wait until soil temperatures reach the mid-50s°F, usually two weeks past the last-frost date. The window closes around early-October, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. The dates above are 1991-2020 normals; in a given year either bookend can move 1-2 weeks either direction. Within Lander, low-lying parcels along drainage features typically lose 4-7°F of overnight low temperature versus the bench positions on calm clear nights, which shifts the working last-frost date by a week or more.
Similar climates: Boulder Flats, WY, Hudson, WY, Ethete, WY, Fort Washakie, WY, Arapahoe, WY.
Frequently asked
- When does it freeze in Lander?
- Lander's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Lander?
- May is the wettest month with about 2.7 inches of rain on average; the city receives roughly 13 inches annually.
- What is the warmest month in Lander?
- July is typically warmest, averaging about 72°F.
- What is the coldest month in Lander?
- January is typically coldest, averaging about 21°F.
- When can I start a vegetable garden in Lander?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Lander get?
- Lander averages about 33 rainy days per year.
- What hardiness zone is Lander?
- Lander'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
Lander, Wyoming sits in a cold semi-arid climate zone. January means hover near 21°F while July averages 72°F — a 50°F seasonal swing.
Across the year, Lander receives about 13 inches of precipitation spread over roughly 33 rainy days.
The rhythm of the year is set by latitude (42.8°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.