Waterloo, IA

NWS NDFD forecast high temperature for Waterloo.

Every year's high on each of the next 7 forecast dates at Waterloo — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.

The hottest and coldest ever recorded at Waterloo in each calendar month, and for the whole 1895–2026 record — with the year each was set.

Records set or tied at Waterloo so far this year — through Aug 30.

Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.

Normal high & low by month, from Waterloo's own 1991–2020 record. Today's normal high: 80°F · forecast is +10° vs normal.

Waterloo's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.

Every day this year against Waterloo's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.

Each cell is one day's high at Waterloo, coloured by temperature — 132 years of record, so heat waves read as warm streaks and cold snaps as blue.

How many days a year hit a given high at Waterloo — counted through Sep 2 each year, so you can see whether 2026 is running hot. Pick a threshold:

9 days ≥90°F so far in 2026 — tied for the 103rd most in 132 years. Normal for this point: 19. Record: 57 in 1936.

A ready-to-share summary of Waterloo's outlook — post it, or link this page.