Two such days as Monday and Tuesday have occurred before in the Washington area. But not for more than six months.

The mercury rose to 86 degrees at Reagan National Airport on Tuesday. It had not climbed so high at the airport since Sept. 8.

Monday’s high at the airport was 80 degrees. The last time Washington had experienced two successive days of temperatures of 80 or above was near the start of October, on the 5th and 6th.

And while October provides much in which to take pleasure, it does not have cherry blossoms, which appeared amid Tuesday’s tempting temperatures to reach the peak of their delicately petaled blooming.

It was not immediately clear on Tuesday how long it had been since Washington and its visitors and residents had last been treated so generously by nature.

Moreover, forecasts indicated that Wednesday might be even warmer, perhaps climbing into the regions in which records are set, and in which hot might describe conditions better than warm.

“Record or near-record warmth is expected Wednesday and Thursday,” National Weather Service forecasters said in an on-line analysis of the weather situation.

Tuesday’s 86 degrees fell four degrees short of the record for April 9, a round 90 degrees, which was reached in 1959.

By what might seem to be a quirk, however, the record high for Wednesday is lower than that for Tuesday — by one degree.

The mercury reached 89 degrees in Washington in 1922, setting an April 10 record, according to weather service data.

The unseasonably warm conditions now enveloping Washington result from high pressure off the mid-Atlantic coast, the Weather Service said. These conditions are expected to persist through Thursday. After that, it is expected to remain comfortable, but in a style more appropriate to spring than summer.