Climate Waterloo - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 39 | 44 | 55 | 67 | 76 | 84 |
| Average low in ºF Av. low Lo | 23 | 27 | 36 | 46 | 55 | 65 |
| Av. precipitation in inch Av. precip. Pre. | 2.45 | 2.53 | 3.30 | 4.09 | 4.93 | 4.22 |
| Av. snowfall in inch Snowfall Sn | 4 | 3 | 1 | 0 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 88 | 87 | 80 | 68 | 56 | 42 |
| Average low in ºF Av. low Lo | 68 | 66 | 59 | 48 | 38 | 27 |
| Av. precipitation in inch Av. precip. Pre. | 4.22 | 3.11 | 3.69 | 3.57 | 3.75 | 3.32 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 3 |
What is the average weather in Waterloo, Illinois?
Waterloo experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are hot, while winters are cold and bring regular snowfall. Precipitation is fairly wet overall, spread relatively evenly through the year, with winter moisture often arriving as snow.
Waterloo Climate Graph - Illinois Climate Chart
Daily normals Waterloo - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 39.1 | 23.7 | 0.08 | 0.08 | 0.12 | 0.30 |
| 2 Jan | 39.0 | 23.6 | 0.20 | 0.20 | 0.20 | 0.50 |
| 3 Jan | 38.9 | 23.6 | 0.28 | 0.28 | 0.31 | 0.80 |
| 4 Jan | 38.9 | 23.5 | 0.35 | 0.35 | 0.39 | 1.00 |
| 5 Jan | 38.8 | 23.4 | 0.43 | 0.43 | 0.51 | 1.30 |
| 6 Jan | 38.8 | 23.4 | 0.51 | 0.51 | 0.59 | 1.50 |
| 7 Jan | 38.8 | 23.3 | 0.59 | 0.59 | 0.71 | 1.80 |
| 8 Jan | 38.8 | 23.3 | 0.67 | 0.67 | 0.79 | 2.00 |
| 9 Jan | 38.8 | 23.2 | 0.75 | 0.75 | 0.98 | 2.50 |
| 10 Jan | 38.8 | 23.2 | 0.83 | 0.83 | 1.10 | 2.80 |
| 11 Jan | 38.8 | 23.2 | 0.91 | 0.91 | 1.18 | 3.00 |
| 12 Jan | 38.8 | 23.1 | 0.94 | 0.94 | 1.30 | 3.30 |
| 13 Jan | 38.8 | 23.1 | 1.02 | 1.02 | 1.42 | 3.60 |
| 14 Jan | 38.8 | 23.1 | 1.10 | 1.10 | 1.50 | 3.80 |
| 15 Jan | 38.9 | 23.1 | 1.14 | 1.14 | 1.61 | 4.10 |
| 16 Jan | 38.9 | 23.1 | 1.22 | 1.22 | 1.81 | 4.60 |
| 17 Jan | 38.9 | 23.1 | 1.30 | 1.30 | 1.89 | 4.80 |
| 18 Jan | 39.0 | 23.1 | 1.38 | 1.38 | 2.09 | 5.30 |
| 19 Jan | 39.1 | 23.1 | 1.46 | 1.46 | 2.20 | 5.60 |
| 20 Jan | 39.1 | 23.1 | 1.54 | 1.54 | 2.40 | 6.10 |
| 21 Jan | 39.2 | 23.1 | 1.61 | 1.61 | 2.60 | 6.60 |
| 22 Jan | 39.3 | 23.1 | 1.69 | 1.69 | 2.80 | 7.10 |
| 23 Jan | 39.4 | 23.2 | 1.77 | 1.77 | 2.91 | 7.40 |
| 24 Jan | 39.5 | 23.2 | 1.85 | 1.85 | 3.11 | 7.90 |
| 25 Jan | 39.6 | 23.3 | 1.97 | 1.97 | 3.19 | 8.10 |
| 26 Jan | 39.7 | 23.3 | 2.05 | 2.05 | 3.39 | 8.60 |
| 27 Jan | 39.9 | 23.4 | 2.13 | 2.13 | 3.50 | 8.90 |
| 28 Jan | 40.0 | 23.5 | 2.20 | 2.20 | 3.70 | 9.40 |
| 29 Jan | 40.2 | 23.5 | 2.28 | 2.28 | 3.90 | 9.90 |
| 30 Jan | 40.3 | 23.6 | 2.36 | 2.36 | 4.02 | 10.20 |
| 31 Jan | 40.5 | 23.7 | 2.44 | 2.44 | 4.21 | 10.70 |
Weather history Waterloo - April 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 02 Apr | - | - | - | 0.00 | 0.0 |
| 03 Apr | - | - | - | 0.00 | 0.0 |
| 04 Apr | - | - | 1.30 | 0.00 | 0.0 |
| 05 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 06 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 07 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 08 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 09 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 10 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 11 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 12 Apr | - | - | T | 0.00 | 0.0 |
| 13 Apr | - | - | T | 0.00 | 0.0 |
| 14 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 15 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 16 Apr | - | - | 1.24 | 0.00 | 0.0 |
| 17 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 18 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 19 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 20 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 21 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 22 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 23 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 24 Apr | - | - | 0.77 | 0.00 | 0.0 |
| 25 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 26 Apr | - | - | 0.00 | 0.00 | 0.0 |
| 27 Apr | - | - | 0.26 | 0.00 | 0.0 |
| 28 Apr | - | - | 0.84 | 0.00 | 0.0 |
| 29 Apr | - | - | 0.58 | 0.00 | 0.0 |
| 30 Apr | - | - | 0.00 | 0.00 | 0.0 |
Past weather Waterloo
| Apr 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | - ºF | 39 ºF | |
| Average low temperature Av. low temp. | - ºF | 23 ºF | |
| Total precipitation Total precip. | 4.99 inch | 2.45 inch | |
| Total snowfall Total snowfall | 0.00 inch | 4 inch | |
| Highest max temperature Highest max temp. | - ºF | - | |
| Lowest max temperature Lowest max temp. | - ºF | - | |
| Highest min temperature Highest min temp. | - ºF | - | |
| Lowest min temperature Lowest min temp. | - ºF | - | |
Past weather April 2026 incomplete - Missing data
Geo Waterloo - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | Monroe | |
| City | Waterloo | |
| Zip Code | 62298 | |
| Longitude | -90.15 dec. degr. | |
| Latitude | 38.33 dec. degr. | |
| Altitude - Elevation | 659ft | |
| ICAO | - | |
| IATA | - |
Date and Time Waterloo - Illinois
| Local Time | 01:26 PM | |
|---|---|---|
| Sunrise | 05:40 AM | |
| Sunset | 08:29 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Waterloo - Illinois
USGS National Map — Open interactive map
Waterloo weather averages
| Annual high temperature | 65ºF |
| Annual low temperature | 47ºF |
| Average annual precip. | 43.18 inch |
| Av. annual snowfall | 11 inch |
Station Data
Monthly averages Waterloo
Longitude: -90.15, Latitude: 38.33
Average weather Waterloo, IL - 62298
Monthly: 1991-2020 normals
History: 2007-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...