As of 23:57 CDT

Weather in Belvidere, IL

57°

Belvidere, Friday, 23 October, 23:57

Partly cloudy. Feels like 56°. High 71°, low 47°.

Pressure30.30 inHg

Wind7.5 mph SE

Humidity72%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for Belvidere, IL: average high 64.2°, average low 48.1°. That is 5.7° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 25 October (72.1°), the coolest 2 November (39.8°).

64.2°/48.1°

Average high / low

+5.7°

Above normal

3 / 5

Wet days / normal

0.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	68°	55.5°	+6.9°
2 November – 11 November	57.7°	50.3°	+4.1°
12 November – 21 November	at normal	45.4°	—

October records over 66 years

88°3 October 2025All-time high

22.1°30 October 1988All-time low

Climate normals and records are computed from the nearest reference point — Rockford (10 mi).

Sat, 2470° / 48°

70 °

Belvidere, Saturday, 24 October

Overcast. High 70°, low 48°.

Pressure30.36 inHg

Wind6.8 mph S

Humidity63%

Visibility6.2 mi

Dew point51°

Sun, 2572° / 49°

72 °

Belvidere, Sunday, 25 October

Partly cloudy. High 72°, low 49°.

Pressure30.39 inHg

Wind5.3 mph S

Humidity60%

Visibility6.2 mi

Dew point52°

Mon, 2666° / 49°

66 °

Belvidere, Monday, 26 October

Overcast. High 66°, low 49°.

Pressure30.36 inHg

Wind6 mph E

Humidity73%

Visibility6.2 mi

Dew point54°

Tue, 2765° / 49°

65 °

Belvidere, Tuesday, 27 October

Overcast. High 65°, low 49°.

Pressure30.27 inHg

Wind7.8 mph SE

Humidity72%

Visibility6.2 mi

Dew point53°

Wed, 2868° / 53°

0.03

68 °

Belvidere, Wednesday, 28 October

Light rain. High 68°, low 53°.

Pressure30.15 inHg

Wind9.6 mph SW

Humidity62%

Visibility—

Dew point50°

Thu, 2971° / 55°

0.04

71 °

Belvidere, Thursday, 29 October

Light rain. High 71°, low 55°.

Pressure30.18 inHg

Wind9.1 mph SW

Humidity58%

Visibility—

Dew point53°

Fri, 3067° / 58°

0.09

67 °

Belvidere, Friday, 30 October

Light rain. High 67°, low 58°.

Pressure30.12 inHg

Wind7.9 mph S

Humidity73%

Visibility—

Dew point57°

Sat, 3169° / 57°

0.23

69 °

Belvidere, Saturday, 31 October

Light rain. High 69°, low 57°.

Pressure30.06 inHg

Wind19.2 mph SE

Humidity48%

Visibility—

Dew point47°

Sun, 0160° / 47°

0.04

60 °

Belvidere, Sunday, 1 November

Light rain. High 60°, low 47°.

Pressure29.91 inHg

Wind19.3 mph S

Humidity69%

Visibility—

Dew point48°

Mon, 0254° / 40°

54 °

Belvidere, Monday, 2 November

Clear. High 54°, low 40°.

Pressure30.09 inHg

Wind13.6 mph W

Humidity42%

Visibility—

Dew point28°

Tue, 0347° / 42°

47 °

Belvidere, Tuesday, 3 November

Partly cloudy. High 47°, low 42°.

Pressure30.09 inHg

Wind15.8 mph NW

Humidity41%

Visibility—

Dew point24°

Wed, 0451° / 40°

51 °

Belvidere, Wednesday, 4 November

Overcast. High 51°, low 40°.

Pressure30.06 inHg

Wind10.3 mph S

Humidity37%

Visibility—

Dew point24°

Thu, 0562° / 40°

62 °

Belvidere, Thursday, 5 November

Overcast. High 62°, low 40°.

Pressure30.00 inHg

Wind7.4 mph SW

Humidity41%

Visibility—

Dew point34°

Fri, 0670° / 48°

70 °

Belvidere, Friday, 6 November

Mostly clear. High 70°, low 48°.

Pressure29.97 inHg

Wind15.6 mph SW

Humidity57%

Visibility—

Dew point51°

Sat, 0761° / 47°

61 °

Belvidere, Saturday, 7 November

Overcast. High 61°, low 47°.

Pressure30.06 inHg

Wind14.4 mph NW

Humidity42%

Visibility—

Dew point37°

From day 17 onward the outlook is built from 60-year climate statistics

Sun, 0850° / 36°

0.05

50 °

Belvidere, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high50°

Average low36°

Average precipitation0.05 in

Chance of precipitation20%

Record high71° (2020)

Record low13° (1991)

Mon, 0950° / 37°

0.11

50 °

Belvidere, Monday, 9 November

Climate normal for this date — 60-year average.

Average high50°

Average low37°

Average precipitation0.11 in

Chance of precipitation32%

Record high73° (2020)

Record low17° (1991)

Tue, 1049° / 35°

0.11

49 °

Belvidere, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high49°

Average low35°

Average precipitation0.11 in

Chance of precipitation30%

Record high71° (2022)

Record low15° (2017)

Wed, 1146° / 33°

0.06

46 °

Belvidere, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.06 in

Chance of precipitation25%

Record high69° (1964)

Record low13° (2019)

Thu, 1245° / 32°

0.07

45 °

Belvidere, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.07 in

Chance of precipitation25%

Record high64° (1964)

Record low3° (2019)

Fri, 1345° / 32°

0.04

45 °

Belvidere, Friday, 13 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.04 in

Chance of precipitation18%

Record high69° (1999)

Record low8° (1986)

Sat, 1446° / 32°

0.06

46 °

Belvidere, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.06 in

Chance of precipitation28%

Record high67° (1971)

Record low10° (1995)

Sun, 1546° / 33°

0.07

46 °

Belvidere, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.07 in

Chance of precipitation27%

Record high69° (2025)

Record low9° (1995)

Mon, 1646° / 32°

0.05

46 °

Belvidere, Monday, 16 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.05 in

Chance of precipitation17%

Record high62° (1988)

Record low19° (2019)

Tue, 1746° / 33°

0.11

46 °

Belvidere, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.11 in

Chance of precipitation27%

Record high71° (2016)

Record low15° (2005)

Wed, 1846° / 33°

0.09

46 °

Belvidere, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.09 in

Chance of precipitation30%

Record high67° (1999)

Record low11° (2014)

Thu, 1946° / 33°

0.06

46 °

Belvidere, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.06 in

Chance of precipitation25%

Record high64° (1983)

Record low16° (1986)

Fri, 2044° / 32°

0.07

44 °

Belvidere, Friday, 20 November

Climate normal for this date — 60-year average.

Average high44°

Average low32°

Average precipitation0.07 in

Chance of precipitation33%

Record high62° (1982)

Record low13° (2022)

Sat, 2143° / 30°

0.09

43 °

Belvidere, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high43°

Average low30°

Average precipitation0.09 in

Chance of precipitation23%

Record high65° (1990)

Record low8° (1964)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Belvidere, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Belvidere, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.