United States · urban-centre population 79,086
Joliet
Weather values are area-weighted across the 32 km² urban centre (2 ERA5 cells).
27.1
matching days / year for “Eternal spring” · 2021-2025 recent-weather sample (not a 30-year normal)
Monthly high (p10–p90)
Whiskers span the 10th–90th percentile daily high; the tick marks the monthly average.
- January: average 0°C, p10 -7°C, p90 6°C
- February: average 3°C, p10 -8°C, p90 13°C
- March: average 11°C, p10 3°C, p90 21°C
- April: average 16°C, p10 7°C, p90 25°C
- May: average 22°C, p10 14°C, p90 29°C
- June: average 28°C, p10 23°C, p90 33°C
- July: average 28°C, p10 25°C, p90 32°C
- August: average 28°C, p10 24°C, p90 32°C
- September: average 26°C, p10 20°C, p90 31°C
- October: average 19°C, p10 12°C, p90 27°C
- November: average 10°C, p10 1°C, p90 19°C
- December: average 4°C, p10 -4°C, p90 12°C
Matching days by month · Eternal spring
- January: 0.0 matching days per year
- February: 0.2 matching days per year
- March: 0.4 matching days per year
- April: 1.6 matching days per year
- May: 3.8 matching days per year
- June: 3.7 matching days per year
- July: 1.1 matching days per year
- August: 3.9 matching days per year
- September: 5.9 matching days per year
- October: 5.3 matching days per year
- November: 1.2 matching days per year
- December: 0.0 matching days per year
Presets
- Eternal spring: 27.1 days/yr
- Mild and dry: 39.8 days/yr
- Beach weather: 39.3 days/yr
- Crisp and clear: 19.7 days/yr
- Warm, not sweaty: 41.7 days/yr