Irena, Missouri Weather
Camellia Blooms Break Through. Day 50 of autumn. Read this microseason across nine climate regions →
Irena weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 3:29 PM CST · Open-Meteo
- TodayNov 10Overcast later——62°43°—
- WednesdayNov 11Clear——57°39°-5°
- ThursdayNov 12Overcast——46°32°-11°
- FridayNov 13Clear——44°29°-2°
- SaturdayNov 14Partly Cloudy——43°28°-1°
- SundayNov 15Overcast17%—44°28°+1°
- MondayNov 16Mostly Clear17%—47°29°+3°
Air quality now AQI 18 · Good
AQI 18 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 31 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 31 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 31
- UV peak
- 0.8 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 31
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).
When the wind is in the west, the weather is at its best.
- Moonrise
- 8:41 AM
- Moonset
- 5:42 PM
- In sign
- ♐︎ Sagittarius
Camellia Blooms Break Through
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Irena at a glance
- Today vs. normal: Today averages 53°F (high 62°F, low 43°F), 12°F above the 41°F normal for Nov 10
- Last frost: April 24 (1991–2020 median, NOAA station 6 km away)
- Microseason: Nov 6–10
- Planting calendar: November — harvest fall brassicas, carrots
16-Day Forecast — Irena
- Tue62°43°0%
- Wed57°39°1%
- Thu46°32°0%
- Fri44°29°0%
- Sat43°28°3%
- Sun44°28°17%
- Mon47°29°17%
- Tue49°32°2%
- Wed50°38°22%
- Thu58°50°29%
- Fri55°43°39%
- Sat43°29°53%
- Sun29°11°32%
- Mon21°10°16%
- Tue28°8°10%
- Wed34°23°13%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Post-frost dormancy
As of November 10, the season's first frost (typically October 14) is due or past. Bring frost-tender plants indoors, mulch overwintering beds, and turn spent plantings under. This city's planting calendar for November: harvest fall brassicas and carrots.
Sun & seasons in Irena
Irena sits in Worth County, where the year’s longest day runs 15h 4m of daylight and its shortest just 9h 16m — a swing of +5h 48m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
St. Louis, the state’s largest city, lies about 257 miles to the ESE. The nearest town Irena tracks is Savannah, roughly 48 miles to the SSW.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | — | tomatoes, peppers, beans, summer squash, winter squash |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
The year in Irena tops out in July (~74°F) and dips lowest in January (~22°F), with June wettest at 5.4 inches and January driest at 0.7 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 22° | 0.7″ | 4 |
| February | 27° | 1.3″ | 5 |
| March | 39° | 2.2″ | 6 |
| April | 50° | 3.4″ | 9 |
| May | 60° | 5.3″ | 11 |
| June | 70° | 5.4″ | 9 |
| July | 74° | 4.4″ | 8 |
| August | 73° | 4.0″ | 8 |
| September | 65° | 3.7″ | 7 |
| October | 52° | 2.9″ | 7 |
| November | 38° | 2.1″ | 5 |
| December | 27° | 1.6″ | 5 |
Regional context
Similar climates Grant City, MO, Allendale, MO, Worth, MO
Drawing on NOAA NCEI 1991-2020 normals, Irena's January averages 22°F and July 74°F — 52°F apart — while precipitation totals roughly 37 inches over some 83 days.
Precipitation in Irena runs summer-dominant: June averages 5.4 inches across 9.2 days of warm-season storms, while January drops to 0.7 inches over 4.0 rainy days of drier cool air. That puts Irena in a summer-convective cohort with places like Grant City, MO, Allendale, MO and Worth, MO.
By April 24 the frosts ease in Irena, opening the season for kale, peas, spinach, and parsnips. Warm-soil crops in Irena wait about two weeks past Irena's last frost, once the soil warms. Irena's window closes around October 14 as Irena's overnight lows return below freezing. Sheltered Irena yards can escape a light frost.
Similar climates: Grant City, MO, Allendale, MO, Worth, MO, Denver, MO, Sheridan, MO.
Frequently asked
- When does it freeze in Irena?
- In Irena, expect the last spring frost near April 24; Irena's first autumn frost comes around October 14.
- What is the rainy season in Irena?
- Irena sees its heaviest rain in June (around 5.4 inches), part of roughly 37 inches a year.
- What is the warmest month in Irena?
- Irena peaks in July, when the mean runs near 74°F.
- What is the coldest month in Irena?
- January is Irena's coldest month, averaging about 22°F.
- When can I start a vegetable garden in Irena?
- In Irena, sow peas and hardy greens around April 24; Irena's tomatoes and peppers wait two weeks more.
- How many rainy days does Irena get?
- Irena records around 83 days of measurable precipitation annually.
- What hardiness zone is Irena?
- Because Irena bottoms near 22°F in January, that winter low sets Irena's USDA zone — verify by ZIP.
- What is the 10-day forecast for Irena?
- Irena'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 Irena?
- See this week's day-by-day rain chances for Irena in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Irena?
- Current conditions for Irena and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Irena forecast updated?
- The Irena forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Irena?
- Today's sunrise and sunset times for Irena 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 Irena?
- The next few days in Irena's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Irena sits at 40.5°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Irena
- 64456