Aurora, Colorado Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Aurora weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——88°52°—
- FridayJun 5Overcast——88°58°0°
- SaturdayJun 6Light Drizzle14%—90°63°+2°
- SundayJun 7Overcast11%—92°62°+2°
- MondayJun 8Overcast26%—91°61°-1°
- TuesdayJun 9Overcast15%—91°65°0°
- WednesdayJun 10Overcast——95°68°+4°
PM2.5 at 9.9 µg/m³, PM10 at 11.2 µg/m³ — typical background levels with no transport signature. AQI down 11 over the last 6 hours (steady decline since this morning).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 9.9 µg/m³, PM10 at 11.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- 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
- 5:28 AM
- Moonset
- 3:05 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Aurora at a glance
- Today vs. normal: 22°F below 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
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.
SPC Convective Outlook
Storm Prediction Center — Aurora
SPC has placed Aurora in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
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
July brings Aurora's peak heat with average temperatures around 75°F, while December delivers the coldest conditions at roughly 32°F. May receives the most rainfall at 2.3 inches, contrasting sharply with January's meager 0.5 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 32° | 0.5″ | 2 |
| February | 33° | 0.5″ | 2 |
| March | 42° | 1.1″ | 3 |
| April | 48° | 1.7″ | 4 |
| May | 58° | 2.3″ | 5 |
| June | 69° | 1.7″ | 4 |
| July | 75° | 2.1″ | 4 |
| August | 73° | 1.8″ | 4 |
| September | 64° | 1.5″ | 3 |
| October | 51° | 1.0″ | 3 |
| November | 40° | 0.7″ | 2 |
| December | 32° | 0.5″ | 2 |
Regional context
Aurora belongs to a hot desert climate region that includes nearby cities with similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Denver, CO, Colorado Springs, CO, Lakewood, CO, Thornton, CO, Grand Junction, CO.
Naturalist notes
Late May brings the emergence of prairie sunflower buds across Colorado's Front Range grasslands.
Mountain bluebirds return to their nesting territories during April's warming days.
Frequently asked
- When does it freeze in Aurora?
- Aurora's final spring frost usually occurs around mid-April, while the first fall frost returns around mid-November.
- What is the rainy season in Aurora?
- May stands as the wettest month with approximately 2.3 inches of rain on average, contributing to the city's roughly 15 inches annually.
- What is the warmest month in Aurora?
- July typically brings the warmest weather, averaging about 75°F.
- What is the coldest month in Aurora?
- December usually delivers the coldest temperatures, averaging about 32°F.
- When can I start a vegetable garden in Aurora?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-April, while warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Aurora get?
- Aurora experiences about 38 rainy days per year on average.
- What hardiness zone is Aurora?
- Aurora's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup using the city ZIP provides the current zone designation.
Climate
Aurora, Colorado experiences a hot desert climate zone. Temperatures hover near 32°F during January while July averages 75°F, creating a 43°F seasonal swing.
Annual precipitation reaches about 15 inches across roughly 38 rainy days throughout the year.
Geography drives Aurora's weather patterns through latitude (39.7°N), proximity to large water bodies, and elevation. These factors determine what plants thrive, frost timing, and daily weather conditions.