Palatine, Illinois Weather
Day 93 of summer. Read today’s microseason across nine climate regions →
Palatine weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:20 AM CDT · Open-Meteo
- TodaySep 21Overcast11%0.02″63°57°—
- TuesdaySep 22Partly Cloudy——60°52°-3°
- WednesdaySep 23Overcast——63°58°+3°
- ThursdaySep 24Overcast——64°60°+1°
- FridaySep 25Overcast——69°57°+5°
- SaturdaySep 26Overcast——62°57°-7°
- SundaySep 27Overcast——73°55°+11°
Air quality now AQI 29 · Good
AQI 29 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 31. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 31
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 5.4 µg/m³, PM10 to 5.5 µg/m³.
- PM2.5/PM10
- 0.98
- Wind
- breezy
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 4:31 PM
- Moonset
- 1:06 AM
- In sign
- ♑︎ Capricorn
Palatine at a glance
- Today vs. normal: Today averages 60°F (high 63°F, low 57°F), about the 61°F normal for Sep 21
- Last frost: April 25 (1991–2020 median, NOAA station 10 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Palatine
- Mon63°57°11%
- Tue60°52°9%
- Wed63°58°2%
- Thu64°60°1%
- Fri69°57°1%
- Sat62°57°3%
- Sun73°55°8%
- Mon76°56°10%
- Tue64°58°24%
- Wed68°54°22%
- Thu72°53°17%
- Fri66°60°26%
- Sat64°59°26%
- Sun82°62°23%
- Mon77°58°16%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Palatine
Interactive wind and temperature map centered on Palatine — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 19) 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, and winter squash.
Sun & seasons in Palatine
Palatine sits in Cook County, where the year’s longest day runs 15h 15m of daylight and its shortest just 9h 6m — a swing of +6h 9m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Chicago, the state’s largest city, lies about 27 miles to the SE. The nearest town Palatine tracks is Round Lake Beach, roughly 18 miles to the N.
Air quality in Palatine
Air quality in Palatine’s county has trended cleaner since 2020; its cleanest year on record was 2025 (median AQI 53). See the full air-quality history for Palatine.
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 | lettuce, peas, spinach, beans, summer squash, garlic |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, garlic |
| 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
Palatine peaks at about 72°F in July and bottoms near 21°F in January; May brings the heaviest rain (5.2 inches) and February the least (1.9 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 21° | 2.1″ | 10 |
| February | 25° | 1.9″ | 9 |
| March | 36° | 2.4″ | 10 |
| April | 47° | 4.0″ | 13 |
| May | 58° | 5.2″ | 14 |
| June | 68° | 4.6″ | 13 |
| July | 72° | 4.0″ | 10 |
| August | 70° | 4.6″ | 11 |
| September | 63° | 3.6″ | 10 |
| October | 51° | 3.4″ | 11 |
| November | 38° | 2.6″ | 11 |
| December | 27° | 2.2″ | 11 |
Regional context
Similar climates Inverness, IL, Rolling Meadows, IL, Arlington Heights, IL
Per NOAA NCEI 1991-2020 normals, Palatine runs from a 21°F January mean to 72°F in July, a 51°F seasonal spread, with near 40.4 inches of precipitation across about 131 wet days.
Precipitation in Palatine runs summer-dominant: May averages 5.2 inches across 13.8 days of warm-season storms, while February drops to 1.9 inches over 8.6 rainy days of drier cool air. That summer-storm rhythm groups Palatine with places like Inverness, IL, Rolling Meadows, IL and Arlington Heights, IL.
Once Palatine passes April 25, freezes fade and Palatine's beds take kale, peas, spinach, and parsnips. Tomatoes and peppers do best set out two weeks later in Palatine, once nights clear the mid-40s°F. Frost returns to Palatine near October 19, ending the tender-crop season. Open lawns in Palatine whiten first when frost returns.
Similar climates: Inverness, IL, Rolling Meadows, IL, Arlington Heights, IL, Deer Park, IL, Kildeer, IL.
Frequently asked
- When does it freeze in Palatine?
- Frost typically leaves Palatine by April 25 and returns to Palatine near October 19.
- What is the rainy season in Palatine?
- Rainfall in Palatine peaks in May near 5.2 inches, out of about 40 inches annually.
- What is the warmest month in Palatine?
- On average July tops the year in Palatine at about 72°F.
- What is the coldest month in Palatine?
- The coldest stretch in Palatine falls in January, around 21°F on average.
- When can I start a vegetable garden in Palatine?
- Around April 25, start frost-hardy crops in Palatine; tomatoes and basil belong a fortnight later.
- How many rainy days does Palatine get?
- Palatine records around 131 days of measurable precipitation annually.
- What hardiness zone is Palatine?
- Because Palatine bottoms near 21°F in January, that winter low sets Palatine's USDA zone — verify by ZIP.
- What is the 10-day forecast for Palatine?
- Palatine'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 Palatine?
- See this week's day-by-day rain chances for Palatine in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Palatine?
- Current conditions for Palatine and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Palatine forecast updated?
- The Palatine forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Palatine?
- Today's sunrise and sunset times for Palatine 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 Palatine?
- The next few days in Palatine's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Palatine sits at 42.1°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Palatine
- 60055
- 60067
- 60074
- 60095