By Reginald Stanley. Posted June 29, 2013, 7:22 PM.

Summer is officially here and has made itself known throughout inland Southern California communities this weekend. A strong ridge of high pressure over Nevada is responsible for the first heat wave of the summer, with hot temperatures peaking over Friday, Saturday and Sunday - primarily in the form of triple-digit temperatures.

Lake Elsinore, Wildomar and Menifee recorded the hottest temperatures Saturday. Lake Elsinore reached a scorching 111.2 degrees, Wildomar 110.4, and Menifee 109.6. Moreno Valley peaked at 108.1 degrees , and East Hemet at 107.8.

Other inland communities that exceeded 100 degrees include San Bernardino with 105.6, Perris with 105.2, Anza with 103.7, South Temecula with 103.6, Jurupa Valley with 103.2, Riverside's Canyon Crest with 102.7, French Valley with 102.1, Riverside's Presidential Park with 101.6, and Beaumont (Cherry Valley) with 101.5.

The Northwest Murrieta weather station is not recording high temperatures correctly at this time (recording a high of only 97.1 Saturday), and is believed to have also reached or exceeded 100 degrees Saturday afternoon.

Simi Valley recorded a high of 96.4 degrees Saturday, missing triple digits.

Closer to the ocean, it was still pretty hot in the communities of De Luz and Fallbrook, recording highs of 95.1 and 94.7 degrees, respectively.

San Diego's City Heights community was the coolest in the WeatherCurrents network with a high of 88.4°F.

In 2012, the first summer heat wave did not occur inland until mid-July. The current heat wave follows a mostly inactive June up to now, with the last heat wave occurring in mid-May. Warm nights typically associated with heat waves have been made worse this year, thanks to persistent warmer-than-average sea surface temperatures off the Southern Californian coastline that have been present since March - moderating nighttime temperatures in the warmer range.

Relief is coming, however. High pressure is expected to shift and weaken beginning Monday, and will gradually bring temperatures down to near-normal for this time of year. Mid or high-level clouds will also increase over the mountains next week.