Ontario, OR

NWS NDFD forecast low temperature for Ontario.

Every year's low on Jul 17 at Ontario. The forecast line shows where today lands; the ringed bar is the coldest on record.

The hottest and coldest ever recorded at Ontario in each calendar month, and for the whole 1945–2026 record — with the year each was set.

Records set or tied at Ontario so far this year — through Jul 11.

Normal low & low by month, from Ontario's own 1991–2020 record. Today's normal low: 61°F · forecast is +5° vs normal.

Ontario's observed daily low 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 Ontario's own record — the record low, the normal, and the full span ever seen. A shareable look at where the year stands.

Each cell is one day's low at Ontario, coloured by temperature — 82 years of record, so heat waves read as warm streaks and cold snaps as blue.

How many days a year hit a given low at Ontario — counted through Jul 17 each year, so you can see whether 2026 is running cold. Pick a threshold:

73 days ≤32°F so far in 2026 — tied for the 54th most in 82 years. Normal for this point: 75. Record: 101 in 1964.

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