Waterloo, Iowa Weather Forecast
Today in Waterloo: mostly sunny with a high near 74°F and a low around 53°F. Rain chance 2%. Rain chances peak at 23% on Tuesday. Cooling trend: highs fall from 74°F today to 65°F by Monday.
Forecast updated 9:05 PM CDT, Oct 23
Active Weather Alerts
7-Day Forecast for Waterloo
Today 10/23
74°53°
Sat 10/24
76°57°
Sun 10/25
72°54°
Mon 10/26
11%
65°51°
Tue 10/27
23%
65°50°
Wed 10/28
18%
69°52°
Thu 10/29
16%
63°48°
Next 24 Hours
| Now | 11 PM | Sat12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky |  | | | | | | | | | | | | | | | | | | | | | | | |
| Temp | 63° | 62° | 61° | 60° | 60° | 59° | 59° | 58° | 57° | 57° | 57° | 59° | 62° | 66° | 70° | 73° | 75° | 76° | 76° | 75° | 72° | 68° | 66° | 64° |
| Rain | 1% | 1% | 1% | 1% | 1% | 1% | 2% | 2% | 2% | 1% | 1% | 1% | 2% | 3% | 3% | 3% | 2% | 2% | 2% | 2% | 2% | 2% | 3% | 2% |
| Wind | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | S 11 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 10 | S 9 | S 7 | S 7 | S 7 |
Growing Conditions
Growing degree days
3,437
since Apr 1, base 50°F
Rain, last 30 days
2.82 in
model analysis
Rain, year to date
37.28 in
since Jan 1
2-inch soil temperature
57°F
yesterday, daily average
Reference ET, last 7 days
0.66 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for Waterloo →
Current Stats & Observations
NWS Forecast
About Waterloo Weather
Waterloo sits at about 892 feet above sea level in Black Hawk County, Iowa. About 111,631 people live in the Waterloo area. Official forecasts and warnings for the area come from the National Weather Service DMX office, and the nearest NEXRAD radar site is KDMX. The city is in USDA plant hardiness zone 5a, where the coldest winter night typically falls between -20 to -15°F. Over the past ten years the last spring freeze has come around Apr 24 and the first fall freeze around Oct 24.
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