LONG RANGE FORECAST THROUGH THE MIDDLE OF SEPTEMBER - 9/1/2019
September is another bridge month. It takes us from summer to fall. It can also see the first cool temperatures arrive. Typically in September, temps are in the 80s and 90s at the beginning of the month, but drop sharply to the 60s and 70s by the end of the month. The all time record for September is 110 which happened in 1943. Average rainfall for Medford in September is just over a half an inch, mostly due to thunderstorm activity at the beginning of the month. In many years September can be dry. Wet storms can arrive at the end of September bringing rain and snow for the mountains. Meteorological fall starts on the 1st, and seasonal fall arrives on the 23rd.
Looking at what we can expect through the middle of the month......the going expectation is for normal to slightly above normal temps to get the month started. So expect to see a lot of 80s and 90s west of the Cascades, and 80s to near 90 for the most part east of the Cascades in the valleys and basins. The mountains will be seeing 60s and 70s in the upper elevations. The coastal areas will be right around average for this time of the year meaning 60s to near 70. Temps are then expected to cool as we get closer to mid September. Look for 70s to near 80 west of the Cascades, with 60s and some cooler 50s for the mountains and east of the Cascades. Rainfall is expected to be slightly above average, and then turning to possibly wetter conditions as we get to the middle of the month. And this is going to be true of the entire region. And if this does verify as forecast, this is going to be a huge departure from what we have been seeing in the first part of September since 2012.