Waterloo, OR
Climate overview — based on NOAA 1991-2020 normals from WATERLOO, OR US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Waterloo
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 6.14 in | — | 17 |
| February | °F | °F | °F | 4.68 in | — | 15 |
| March | °F | °F | °F | 5.19 in | — | 16 |
| April | °F | °F | °F | 4.07 in | — | 15 |
| May | °F | °F | °F | 2.82 in | — | 12 |
| June | °F | °F | °F | 1.95 in | — | 9 |
| July | °F | °F | °F | 0.36 in | — | 3 |
| August | °F | °F | °F | 0.51 in | — | 3 |
| September | °F | °F | °F | 1.72 in | — | 6 |
| October | °F | °F | °F | 3.88 in | — | 12 |
| November | °F | °F | °F | 6.53 in | — | 16 |
| December | °F | °F | °F | 7.29 in | — | 16 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when