The Galena Territory weather by month
What a typical year looks like in The Galena Territory, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Bellevue L/d 12, 17 km from The Galena Territory; records cover 1941–2026.
The year at a glance
- Precipitation a year
- 37.8 in960 mm
- Snow a year
- 32 in81 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 12
- Heating degree days
- 6,712
- Cooling degree days
- 822
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
The Galena Territory in January
Highs average 29°−2° and lows 12°−11°, with 1.3 in33 mm of precipitation and 9 in24 cm of snow in a typical January.
- Record high
- 63°17° (1944)
- Record low
- −35°−37° (2009)
- Heating degree days
- 1379
- Cooling degree days
- 0
The Galena Territory in February
Highs average 34°1° and lows 15°−9°, with 1.6 in40 mm of precipitation and 8 in21 cm of snow in a typical February.
- Record high
- 74°23° (2017)
- Record low
- −34°−37° (1996)
- Heating degree days
- 1140
- Cooling degree days
- 0
The Galena Territory in March
Highs average 46°8° and lows 26°−3°, with 2.2 in55 mm of precipitation and 4 in10 cm of snow in a typical March.
- Record high
- 87°31° (1986)
- Record low
- −23°−31° (2015)
- Heating degree days
- 900
- Cooling degree days
- 1
The Galena Territory in April
Highs average 59°15° and lows 37°3°, with 3.8 in96 mm of precipitation and 0.4 in1 cm of snow in a typical April.
- Record high
- 94°34° (1980)
- Record low
- 5°−15° (1982)
- Heating degree days
- 504
- Cooling degree days
- 4
The Galena Territory in May
Highs average 71°22° and lows 48°9°, with 4.2 in107 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 95°35° (2012)
- Record low
- 23°−5° (2005)
- Heating degree days
- 211
- Cooling degree days
- 48
The Galena Territory in June
Highs average 81°27° and lows 59°15°, with 5.6 in142 mm of precipitation in a typical June.
- Record high
- 100°38° (1988)
- Record low
- 35°2° (1972)
- Heating degree days
- 30
- Cooling degree days
- 179
The Galena Territory in July
Highs average 85°29° and lows 63°17°, with 4.3 in110 mm of precipitation in a typical July.
- Record high
- 103°39° (2012)
- Record low
- 41°5° (1972)
- Heating degree days
- 4
- Cooling degree days
- 272
The Galena Territory in August
Highs average 83°28° and lows 61°16°, with 3.8 in96 mm of precipitation in a typical August.
- Record high
- 103°39° (1988)
- Record low
- 32°0° (1986)
- Heating degree days
- 10
- Cooling degree days
- 221
The Galena Territory in September
Highs average 76°24° and lows 52°11°, with 3.7 in93 mm of precipitation in a typical September.
- Record high
- 99°37° (1985)
- Record low
- 24°−4° (1942)
- Heating degree days
- 116
- Cooling degree days
- 87
The Galena Territory in OctoberThis month
Highs average 63°17° and lows 41°5°, with 3.2 in81 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 95°35° (1997)
- Record low
- 14°−10° (1952)
- Heating degree days
- 423
- Cooling degree days
- 10
The Galena Territory in November
Highs average 47°8° and lows 29°−1°, with 2.3 in59 mm of precipitation and 1.3 in3.3 cm of snow in a typical November.
- Record high
- 77°25° (1999)
- Record low
- −9°−23° (1977)
- Heating degree days
- 803
- Cooling degree days
- 0
The Galena Territory in December
Highs average 34°1° and lows 19°−7°, with 1.9 in49 mm of precipitation and 8 in21 cm of snow in a typical December.
- Record high
- 72°22° (2021)
- Record low
- −26°−32° (1950)
- Heating degree days
- 1192
- Cooling degree days
- 0