Otis, Colorado Weather
Thunder retreats as the monsoon dies. Day 93 of summer. Read this microseason across nine climate regions →
Otis weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 8:22 AM MDT · Open-Meteo
- TodaySep 21Clear17%—74°52°—
- TuesdaySep 22Clear12%—78°52°+4°
- WednesdaySep 23Drizzle26%0.07″70°59°-8°
- ThursdaySep 24Overcast36%—79°60°+9°
- FridaySep 25Light Showers28%—81°60°+2°
- SaturdaySep 26Light Drizzle16%0.01″84°62°+3°
- SundaySep 27Partly Cloudy21%—84°58°0°
Air quality now AQI 19 · Good
AQI 19 (Good), driven by Ozone. AQI projected to climb to 41 over the next 6 hours.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 PM.
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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:26 PM
- Moonset
- 1:14 AM
- In sign
- ♑︎ Capricorn
Thunder retreats as the monsoon dies
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Otis at a glance
- Today vs. normal: Today averages 63°F (high 74°F, low 52°F), 2°F above the 61°F normal for Sep 21
- Last frost: May 8 (1991–2020 median, NOAA station 15 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots
16-Day Forecast — Otis
- Mon74°52°17%
- Tue78°52°12%
- Wed70°59°26%
- Thu79°60°36%
- Fri81°60°28%
- Sat84°62°16%
- Sun84°58°21%
- Mon79°60°33%
- Tue71°56°33%
- Wed83°55°7%
- Thu86°59°8%
- Fri87°64°14%
- Sat72°46°17%
- Sun59°44°20%
- Mon78°47°17%
- Tue77°57°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 6) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, and carrots.
SPC Convective Outlook
Storm Prediction Center — Otis
SPC includes Otis in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
Sun & seasons in Otis
Otis sits in Washington County, where the year’s longest day runs 15h 2m of daylight and its shortest just 9h 19m — a swing of +5h 43m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Denver, the state’s largest city, lies about 105 miles to the WSW. The nearest town Otis tracks is Greeley, roughly 97 miles to the WNW.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | garlic (overwinter) | peas, tomatoes, peppers, beans, summer squash, garlic |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| October | — | fall brassicas, carrots |
A year in weather
Otis peaks at about 75°F in July and bottoms near 29°F in January; May brings the heaviest rain (2.8 inches) and January the least (0.3 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 29° | 0.3″ | 4 |
| February | 31° | 0.4″ | 5 |
| March | 40° | 0.9″ | 6 |
| April | 47° | 1.5″ | 8 |
| May | 57° | 2.8″ | 10 |
| June | 68° | 2.4″ | 9 |
| July | 75° | 2.4″ | 9 |
| August | 73° | 2.3″ | 8 |
| September | 64° | 1.3″ | 6 |
| October | 50° | 1.1″ | 5 |
| November | 38° | 0.5″ | 4 |
| December | 29° | 0.4″ | 4 |
Regional context
Similar climates Yuma, CO, Akron, CO, Eckley, CO
By the nearest station's NOAA NCEI 1991-2020 normals, Otis sees 29°F Januarys and 75°F Julys, a 46°F range, plus around 16.2 inches of precipitation across 78 days.
Precipitation in Otis runs summer-dominant: May averages 2.8 inches across 10.0 days of warm-season storms, while January drops to 0.3 inches over 3.9 rainy days of drier cool air. Otis shares that warm-season-wet pattern with places like Yuma, CO, Akron, CO and Eckley, CO.
By May 8 the frosts ease in Otis, opening the season for kale, peas, spinach, and parsnips. In Otis, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Otis's frost date. Around October 6, freezing nights resume in Otis and tender crops must come in. Sheltered Otis yards can escape a light frost.
Similar climates: Yuma, CO, Akron, CO, Eckley, CO, Merino, CO, Hillrose, CO.
Frequently asked
- When does it freeze in Otis?
- Frost typically leaves Otis by May 8 and returns to Otis near October 6.
- What is the rainy season in Otis?
- May is the wettest month in Otis, about 2.8 inches on average; the year totals roughly 16 inches.
- What is the warmest month in Otis?
- On average July tops the year in Otis at about 75°F.
- What is the coldest month in Otis?
- The coldest stretch in Otis falls in January, around 29°F on average.
- When can I start a vegetable garden in Otis?
- In Otis, sow peas and hardy greens around May 8; Otis's tomatoes and peppers wait two weeks more.
- How many rainy days does Otis get?
- Otis records around 78 days of measurable precipitation annually.
- What hardiness zone is Otis?
- With January around 29°F, Otis's zone reflects that minimum — the USDA ZIP map confirms Otis's band.
- What is the 10-day forecast for Otis?
- Otis's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Otis?
- See this week's day-by-day rain chances for Otis in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Otis?
- Current conditions for Otis and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Otis forecast updated?
- The Otis forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Otis?
- Today's sunrise and sunset times for Otis are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Otis?
- The next few days in Otis's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Otis sits at 40.2°N; its climate zone is cold semi-arid (Köppen approximation).
ZIP codes in Otis
- 80743