Arlington Heights, IL Weather

Cook County11:00 PM CDT42.09°N, 87.98°WElevation 702 ft

Current conditions

Clear
59°
Clear
Feels like 59°
High 73° Sunday·Low 52° tonight
WindSSE 7 mph
Humidity59%
Dew point45°
Pressure30.38 inHg
Visibility10 mi
Cloud cover46%
UV index0 Low
Sunrise7:16 AM
Sunset5:58 PM

Observed at Chicago, Chicago-O'Hare International Airport · 30 min ago

Forecast

10-day

  • Saturday Night

    Mostly cloudy, with a low around 52.

  • Sunday

    Partly sunny, with a high near 73.

  • Sunday Night

    Mostly cloudy, with a low around 52.

National Weather Service forecast updated 2 days ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 58°
  2. Sun12 AM Partly Cloudy 58°
  3. 1 AM Partly Cloudy 57°
  4. 2 AM Mostly Cloudy 56°
  5. 3 AM Mostly Cloudy 55°
  6. 4 AM Mostly Cloudy 54°
  7. 5 AM Mostly Cloudy 53°
  8. 6 AM Partly Sunny 52°
  9. 7 AM Partly Sunny 52°
  10. 8 AM Partly Sunny 54°
  11. 9 AM Partly Sunny 58°
  12. 10 AM Partly Sunny 62°
  13. 11 AM Partly Sunny 65°
  14. 12 PM Partly Sunny 68°
  15. 1 PM Mostly Sunny 71°
  16. 2 PM Mostly Sunny 73°
  17. 3 PM Mostly Sunny 73°
  18. 4 PM Mostly Sunny 73°
  19. 5 PM Mostly Sunny 70°
  20. 6 PM Mostly Cloudy 67°
  21. 7 PM Mostly Cloudy 66°
  22. 8 PM Mostly Cloudy 63°
  23. 9 PM Mostly Cloudy 61°
  24. 10 PM Mostly Cloudy 59°

10-day forecast

Details
  1. ThuOct 22 Sunny Sunny49°72°
  2. FriOct 23 Areas Of Fog then Mostly Sunny Areas Of Fog then Mostly Sunny50°71°
  3. TodayOct 24 Mostly Sunny Mostly Sunny52°70°
  4. SunOct 25 Partly Sunny Partly Sunny52°73°
  5. MonOct 26 Partly Sunny Partly Sunny12%49°66°
  6. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers20%46°62°
  7. WedOct 28 Slight Chance Rain Showers then Partly Sunny Slight Chance Rain Showers then Partly Sunny16%47°61°
  8. ThuOct 29 Cloudy Cloudy0.12 in36°60°
  9. FriOct 30 Sunny Sunny32°46°
  10. SatOct 31 Mostly sunny Mostly sunny33°52°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Arlington Heights

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Air quality

84
Moderate
Ozone

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • SatModerate
  • SunModerate
  • MonModerate

North and West Suburbs (Chicago), IL reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:16 AM
Sunset 5:58 PM
Daylight 10 h 42 min (−2 min 38 s tomorrow)
Waxing Gibbous · 99% lit
Moonrise 4:50 PM Moonset 5:29 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low59° / 43°
Record high83° (2023)
Record low17° (1981)
Wettest1.85 in (2021)
Yesterday71° / 49°
Month to date2.54 in (normal 2.57 in)

Chicago Area, records since 1872. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in LOT, issued 4 hrs ago

Key Messages

- Generally well above normal temperatures will continue, albeit with a modest cool-down on Monday near and north of I-80, and particularly near Lake Michigan.

- There are periodic low/uncertain rain chances in the mid to late workweek period, with the best chance of any meaningful rainfall not until next Saturday (Halloween) night.

Discussion

Issued at 225 PM CDT Sat Oct 24 2026

Tonight through Sunday:

Following a calm, cool, and partly cloudy night tonight (relative to this afternoon's warmth), Sunday has a decent chance to be one of the warmest days of this current stretch. Mid and higher level cloud cover may limit temps from really overperforming, though currently expecting enough sun for widespread mid 70s highs away from the immediate Illinois shore. Localized upper 70s readings are plausible, especially over southwestern sections of the CWA (ie. in/near Pontiac).

Sunday Night through Saturday:

A backdoor cold front will move across the area Sunday night, knocking temps down vs. the weekend for Monday's highs, but still above average for late October. The coolest readings (around 60F/low 60s) will be found near Lake Michigan due to strengthening north-northeast winds. Expansive surface high pressure over the region on Monday night will likely yield the coolest night of the week (still solidly above normal for late October).

Tuesday will warm back to farther above average, followed by another period of well above average temps (highs approaching 80F in spots?!) centered on midweek. Chances for rain mid to late next week, while not zero, are low/nebulous, and the best chance for anything of note looks to be confined to primarily west and north of the local area. If a weakening cold front is able to push south across at least the northern half of the area Thursday-Thursday night, that would result in lower temps than in the official forecast (especially near the lake).

Aviation

Issued at 613 PM CDT Sat Oct 24 2026

Quiet VFR aviation weather conditions will persist through the period. Winds are becoming light southeast with sunset, and will remain generally southeast through the night. Winds will likely become light south (~5 kt or less) pre-dawn, then shift south- southwest to southwest (190-210 deg) just under 10 kts after sunrise.

Patchy mid/high level VFR clouds will linger across the area through Sunday.

Ratzer

Lot Watches

IL...None. IN...None. LM...None.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.