Best time to visit Peoria
The best time to visit Peoria is September, judged on twenty years of weather records and the events worth going for.
Peoria, Illinois, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 0.7 °C / 33 °F | -7.2 °C / 19 °F | 52 mm / 2 in | neither best nor good |
| February | 2.6 °C / 37 °F | -6.3 °C / 21 °F | 55 mm / 2.2 in | neither best nor good |
| March | 10.7 °C / 51 °F | 1 °C / 34 °F | 92 mm / 3.6 in | neither best nor good |
| April | 16.8 °C / 62 °F | 6.1 °C / 43 °F | 115 mm / 4.5 in | good month |
| May | 22.9 °C / 73 °F | 12.7 °C / 55 °F | 122 mm / 4.8 in | good month |
| June | 27.9 °C / 82 °F | 18.1 °C / 65 °F | 122 mm / 4.8 in | good month |
| July | 29 °C / 84 °F | 19.7 °C / 67 °F | 90 mm / 3.5 in | good month |
| August | 28.3 °C / 83 °F | 18.5 °C / 65 °F | 73 mm / 2.9 in | good month |
| September | 25.5 °C / 78 °F | 14.4 °C / 58 °F | 73 mm / 2.9 in | best month |
| October | 18.3 °C / 65 °F | 7.8 °C / 46 °F | 87 mm / 3.4 in | good month |
| November | 10.4 °C / 51 °F | 1.2 °C / 34 °F | 61 mm / 2.4 in | neither best nor good |
| December | 3.9 °C / 39 °F | -3.8 °C / 25 °F | 68 mm / 2.7 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: good
- JJune: good
- JJuly: good
- AAugust: good
- SSeptember: best
- OOctober: good
- NNovember: neither
- DDecember: neither
- Best
- September
- Good
- April–August, October
Why these months
April · good
In its favour: share of daylight that is sunny 69%, feels like (high) 14 °C / 57 °F, average daily high 16.8 °C / 62 °F, precipitation 115 mm / 4.5 in, relative humidity 63%, days with heavy rain 4.2 days, wet days 11.8 days, average daily low 6.1 °C / 43 °F.
May · good
In its favour: feels like (high) 22.3 °C / 72 °F, average daily high 22.9 °C / 73 °F, share of daylight that is sunny 73%, precipitation 122 mm / 4.8 in, average daily low 12.7 °C / 55 °F, relative humidity 66%, days with heavy rain 4.3 days.
Against: wet days 12.9 days.
June · good
In its favour: share of daylight that is sunny 79%, feels like (high) 29.5 °C / 85 °F, average daily high 27.9 °C / 82 °F, precipitation 122 mm / 4.8 in, average daily low 18.1 °C / 65 °F, relative humidity 67%, days with heavy rain 4.2 days, wet days 11.8 days.
July · good
In its favour: share of daylight that is sunny 84%, precipitation 90 mm / 3.5 in, average daily high 29 °C / 84 °F, wet days 9.3 days, days with heavy rain 3.2 days, average daily low 19.7 °C / 67 °F, relative humidity 72%.
Against: feels like (high) 31.9 °C / 89 °F.
August · good
In its favour: share of daylight that is sunny 85%, precipitation 73 mm / 2.9 in, average daily high 28.3 °C / 83 °F, days with heavy rain 2.4 days, wet days 9.2 days, average daily low 18.5 °C / 65 °F, relative humidity 72%.
Against: feels like (high) 30.6 °C / 87 °F.
September · best
In its favour: feels like (high) 25.6 °C / 78 °F, average daily high 25.5 °C / 78 °F, share of daylight that is sunny 81%, precipitation 73 mm / 2.9 in, wet days 7.7 days, days with heavy rain 2.5 days, average daily low 14.4 °C / 58 °F, relative humidity 69%.
October · good
In its favour: feels like (high) 15.7 °C / 60 °F, average daily high 18.3 °C / 65 °F, share of daylight that is sunny 72%, precipitation 87 mm / 3.4 in, wet days 9.1 days, days with heavy rain 3 days, relative humidity 67%, average daily low 7.8 °C / 46 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: good
- AApril: best
- MMay: good
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- April, October–November
- Good
- March, May, September
Why these months
March · good
In its favour: average daily high 10.7 °C / 51 °F, precipitation 92 mm / 3.6 in, share of daylight that is sunny 70%, daylight per day 12 h, wet days 11.2 days, days with heavy rain 3.4 days, average daily low 1 °C / 34 °F, wind (daily max) 22 km/h / 13 mph, feels like (high) 6.9 °C / 44 °F.
April · best
In its favour: average daily high 16.8 °C / 62 °F, precipitation 115 mm / 4.5 in, feels like (high) 14 °C / 57 °F, average daily low 6.1 °C / 43 °F, share of daylight that is sunny 69%, daylight per day 13.3 h, wet days 11.8 days, wind (daily max) 23 km/h / 14 mph.
Against: days with heavy rain 4.2 days.
May · good
In its favour: average daily high 22.9 °C / 73 °F, average daily low 12.7 °C / 55 °F, precipitation 122 mm / 4.8 in, share of daylight that is sunny 73%, daylight per day 14.5 h, feels like (high) 22.3 °C / 72 °F, wind (daily max) 20 km/h / 12 mph.
Against: days with heavy rain 4.3 days, wet days 12.9 days.
September · good
In its favour: precipitation 73 mm / 2.9 in, wet days 7.7 days, average daily high 25.5 °C / 78 °F, days with heavy rain 2.5 days, share of daylight that is sunny 81%, daylight per day 12.4 h, average daily low 14.4 °C / 58 °F, wind (daily max) 17 km/h / 11 mph, feels like (high) 25.6 °C / 78 °F.
October · best
In its favour: average daily high 18.3 °C / 65 °F, precipitation 87 mm / 3.4 in, wet days 9.1 days, feels like (high) 15.7 °C / 60 °F, average daily low 7.8 °C / 46 °F, share of daylight that is sunny 72%, days with heavy rain 3 days, daylight per day 11.1 h, wind (daily max) 20 km/h / 13 mph.
November · best
In its favour: precipitation 61 mm / 2.4 in, average daily high 10.4 °C / 51 °F, wet days 7.5 days, days with heavy rain 2.1 days, share of daylight that is sunny 68%, average daily low 1.2 °C / 34 °F, wind (daily max) 21 km/h / 13 mph, feels like (high) 6.6 °C / 44 °F.
Against: daylight per day 9.9 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Sugar Mountain Resort, 842 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | -4 °C | -2 °C | 6.9 °C | 14 °C | 22.3 °C | 29.5 °C | 31.9 °C | 30.6 °C | 25.6 °C | 15.7 °C | 6.6 °C | -0.3 °C |
| Days with heavy rain | 1.5 days | 1.8 days | 3.4 days | 4.2 days | 4.3 days | 4.2 days | 3.2 days | 2.4 days | 2.5 days | 3 days | 2.1 days | 2.1 days |
| Time rain usually falls | 10 pm | 2 pm | 10 pm | 7 pm | 9 pm | 4 am | 5 pm | 5 pm | 6 am | 12 am | 1 am | 6 am |
| Sunshine per day | 5.9 h | 7.4 h | 8.3 h | 9.2 h | 10.6 h | 11.8 h | 12.3 h | 11.7 h | 10.1 h | 8 h | 6.7 h | 5.4 h |
| Relative humidity | 74% | 70% | 67% | 63% | 66% | 67% | 72% | 72% | 69% | 67% | 70% | 76% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 7.6 µg/m³ | 8.9 µg/m³ | 7.8 µg/m³ | 8.4 µg/m³ | 10.2 µg/m³ | 15.9 µg/m³ | 12.8 µg/m³ | 9.8 µg/m³ | 8.2 µg/m³ | 6.1 µg/m³ | 6.3 µg/m³ | 6.9 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 11.8 µg/m³ | 13.5 µg/m³ | 12.5 µg/m³ | 13.7 µg/m³ | 16.1 µg/m³ | 23.5 µg/m³ | 18.9 µg/m³ | 14.3 µg/m³ | 12.7 µg/m³ | 9.6 µg/m³ | 9.7 µg/m³ | 11.3 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.