Climate Ottawa - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 31 | 36 | 49 | 62 | 72 | 81 |
| Average low in ºF Av. low Lo | 15 | 19 | 29 | 40 | 51 | 60 |
| Av. precipitation in inch Av. precip. Pre. | 1.48 | 1.43 | 2.46 | 3.22 | 4.11 | 3.98 |
| Av. snowfall in inch Snowfall Sn | 8 | 5 | 3 | 1 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 84 | 83 | 77 | 65 | 49 | 36 |
| Average low in ºF Av. low Lo | 64 | 62 | 54 | 42 | 30 | 20 |
| Av. precipitation in inch Av. precip. Pre. | 3.85 | 3.89 | 3.26 | 2.80 | 0.00 | 2.13 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 0 | 5 |
Ottawa Climate Graph - Illinois Climate Chart
Daily normals Ottawa - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 31.9 | 15.8 | 0.08 | 0.08 | 0.20 | 0.50 |
| 2 Jan | 31.8 | 15.7 | 0.12 | 0.12 | 0.39 | 1.00 |
| 3 Jan | 31.7 | 15.6 | 0.16 | 0.16 | 0.71 | 1.80 |
| 4 Jan | 31.6 | 15.5 | 0.24 | 0.24 | 0.91 | 2.30 |
| 5 Jan | 31.5 | 15.4 | 0.28 | 0.28 | 1.18 | 3.00 |
| 6 Jan | 31.5 | 15.3 | 0.35 | 0.35 | 1.42 | 3.60 |
| 7 Jan | 31.4 | 15.2 | 0.39 | 0.39 | 1.69 | 4.30 |
| 8 Jan | 31.3 | 15.2 | 0.43 | 0.43 | 1.89 | 4.80 |
| 9 Jan | 31.3 | 15.1 | 0.51 | 0.51 | 2.20 | 5.60 |
| 10 Jan | 31.2 | 15.0 | 0.55 | 0.55 | 2.40 | 6.10 |
| 11 Jan | 31.2 | 15.0 | 0.63 | 0.63 | 2.72 | 6.90 |
| 12 Jan | 31.2 | 14.9 | 0.67 | 0.67 | 2.91 | 7.40 |
Weather history Ottawa - June 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Jun | 79.0 | 57.9 | 0.00 | - | - |
| 02 Jun | 78.1 | 51.1 | 0.00 | - | - |
| 03 Jun | 80.1 | 48.9 | 0.00 | - | - |
| 04 Jun | - | - | - | - | - |
| 05 Jun | 84.0 | 64.0 | 0.00 | - | - |
| 06 Jun | 80.1 | 68.0 | 0.07 | - | - |
| 07 Jun | 89.1 | 68.0 | 0.90 | - | - |
| 08 Jun | - | - | - | - | - |
| 09 Jun | - | - | - | - | - |
| 10 Jun | - | - | - | - | - |
| 11 Jun | - | - | - | - | - |
| 12 Jun | - | - | - | - | - |
| 13 Jun | - | - | - | - | - |
| 14 Jun | - | - | - | - | - |
| 15 Jun | - | - | - | - | - |
| 16 Jun | - | - | - | - | - |
| 17 Jun | - | - | - | - | - |
| 18 Jun | - | - | - | - | - |
| 19 Jun | - | - | - | - | - |
| 20 Jun | - | - | - | - | - |
| 21 Jun | - | - | - | - | - |
| 22 Jun | - | - | - | - | - |
| 23 Jun | - | - | - | - | - |
| 24 Jun | - | - | - | - | - |
| 25 Jun | - | - | - | - | - |
| 26 Jun | - | - | - | - | - |
| 27 Jun | - | - | - | - | - |
| 28 Jun | - | - | - | - | - |
| 29 Jun | - | - | - | - | - |
| 30 Jun | - | - | - | - | - |
Past weather Ottawa
| Jun 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 81.7 ºF | 31 ºF | |
| Average low temperature Av. low temp. | 59.7 ºF | 15 ºF | |
| Total precipitation Total precip. | 0.97 inch | 1.48 inch | |
| Total snowfall Total snowfall | - inch | 8 inch | |
| Highest max temperature Highest max temp. | 89.1 ºF | - | |
| Lowest max temperature Lowest max temp. | 78.1 ºF | - | |
| Highest min temperature Highest min temp. | 68.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 48.9 ºF | - | |
Past weather June 2026 incomplete - Missing data
Geo Ottawa - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | LaSalle | |
| City | Ottawa | |
| Zip Code | 61350 | |
| Longitude | -88.79 dec. degr. | |
| Latitude | 41.4 dec. degr. | |
| Altitude - Elevation | 617ft | |
| ICAO | - | |
| IATA | - |
Date and Time Ottawa - Illinois
| Local Time | 08:20 PM | |
|---|---|---|
| Sunrise | 05:19 AM | |
| Sunset | 08:29 PM | |
| Day/Night | Day | |
| Timezone | Chicago -6:00 | |
| Timezone DB | America - Chicago |
Map of Ottawa - Illinois
USGS National Map — Open interactive map
Ottawa weather averages
| Annual high temperature | 60ºF |
| Annual low temperature | 41ºF |
| Average annual precip. | 32.61 inch |
| Av. annual snowfall | 22 inch |
Station Data
Monthly averages Ottawa
Longitude: -88.7939, Latitude: 41.3998
Average weather Ottawa, IL - 61350
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, ...