DENVER — After Denver’s hottest September on record, Tuesday will be a cool break from the heat before record-breaking temperatures return, according to the National Weather Service.

September had an average temperature — a combination of the daily highs and lows throughout the month — of 70 degrees, according to NWS meteorologists. The previous record, set in 2015, was 69.4 degrees.

The top 20 warmest Septembers in Denver are all within 3 degrees of each other, according to NWS data.

September typically sees about two days reach temperature highs at or above 90 degrees, according to NWS data. This year, nine days passed the 90-degree mark.

The record-breaking heat is expected to keep coming this week with both Wednesday and Saturday forecast to set their own daily records, NWS forecasters said.

After a forecast high of 78 degrees in Denver on Tuesday, temperatures are expected to jump 12 degrees to a 90-degree high on Wednesday, according to forecasters.

If Denver reaches the expected 90-degree high, it will break the previous Oct. 2 record of 88 degrees set in 2005, according to NWS data.

Both Thursday and Friday are expected to fall a few degrees short of setting new heat records, but Saturday will break the record for the hottest Oct. 5 in Denver if it reaches the forecast 89-degree high, NWS forecasters said. The previous Oct. 5 record of 86 degrees was set in 1997.

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