Waterloo (Iowa) weather by month & the best time to visit

🇺🇸 United States · small town · hot-summer continental climate

The best time to visit Waterloo (Iowa) is September — its sunniest month (Sunshine Score 76/100), with July and August close behind. Waterloo (Iowa) averages about 2,391 hours of sunshine a year. Daytime highs around 24°C / 75°F and roughly 92 mm of rain in September.

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Sun hours / year

2,391

Sunniest month

September

Peak score

76/100

Rain / year

929 mm

Snow / year

≈1.4 m

Midday UV at peak

8 (very high)

Population

68k

Elevation

264 m

When is the best time to visit Waterloo (Iowa)?

For sunshine, the best time to visit Waterloo (Iowa) is September, then July and August. The dullest month is January (0/100, 26 mm of rain). The full month-by-month picture is in the table below.

How sunny is Waterloo (Iowa)?

Waterloo (Iowa) gets a moderate 2,391 hours of sunshine a year. 76 Sunshine Score points separate September (76) from January (0), so the month you pick matters. It ranks #249 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 929 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

See Waterloo (Iowa) on the interactive sunshine globe →

Nearby places for sunshine

• Cedar Rapids United States · 94 km · best in Sep · 2,315 h sun/yr
• Rochester (Minnesota) United States · 150 km · best in Jul · 2,340 h sun/yr
• Des Moines United States · 154 km · best in Sep · 2,394 h sun/yr
• Moline United States · 199 km · best in Sep · 2,290 h sun/yr
• Madison United States · 258 km · best in Sep · 2,236 h sun/yr
• Minneapolis United States · 267 km · best in Sep · 2,337 h sun/yr

Nearest destinations

• Mason City United States · 101 km · 2,397 h sun/yr · best in Sep
• Dubuque United States · 140 km · 2,280 h sun/yr · best in Sep
• Fort Dodge United States · 147 km · 2,443 h sun/yr · best in Sep