As of this morning (still need to figure in today's high of 68 & see what the low will be as we continue to drop as of 11 p.m.), September 2021 was the 7th warmest on record (records back to 1879) at Purdue (Purdue University 1879-1943, Purdue Airport 1944-Present).
September 2021's 71.1-degree mean temperature so far just nudges September 1891 by 0.3 of a degree.
Highs today reached 60-70. It was coolest where clouds & some showers hung on the longest.
With clear skies & light winds lows tonight should drop to 42-46. However, after 5 a.m., the temperature will likely rise 2-3 degrees as a light southwest wind commences. Some patchy shallow fog is possible in low-lying, sheltered areas & around water.
Friday looks mostly sunny & breezy to windy from the southwest (15-30 mph) with 74-79.
Clouds will increase after 8 p.m.
Friday night-early Saturday morning 1-5 a.m., a few scattered showers & t'showers will pass through. Lows of 53-59 are likely.
Rainfall totals should run 0.05-0.35".
Saturday look good to mostly sunny to partly cloudy skies, west wind 10-20 mph & highs 68-75. This will be followed by mostly clear skies & 45-51 early Sunday morning.
Sunday looks great with mostly sunny to partly cloudy skies, southwest wind 10-20 mph & highs 75-80.
Next week looks great!
Monday looks warm with highs 82-87 with southwest wind 20-30 mph, followed by 83-87 Tuesday with southwest winds 15-25 mph.
Wednesday looks very warm with highs 84-89 with southwest wind 10-20 mph.
As for Thursday, it looks continued mostly sunny with highs 81-86 as wind goes to the northeast, then east with weak surface frontal passage from the north & northeast.
Front should move back north as a warm front Friday, October 1, brining winds back to the south, then the southwest.
Note the dominance of warmth with above to well-above normal temperatures over the Plains to Midwest & Northeast September 29-October 4:
Dry pattern late September to early October dominates:
High/Low...Date, Day Conditions
86/58...Oct. 1, Fri. Partly Cloudy, S to SW 10-25 mph...Record: 92-1897
88/64...Oct. 2, Sat. Partly Cloudy, SW Wind 15-25 mph...Record: 92-1983
88/65...Oct. 3, Sun. Partly Cloudy, SW Wind 20-35 mph...Record: 90-1922
84/68...Oct. 4, Mon. Partly Cloudy, Isolated Storms, W Wind 10-15 mph....90-1954
71/47...Oct. 5, Tue. Partly Cloudy, WNW 10 mph.
70/45...Oct. 6, Wed. Mostly Sunny, W 10 mph.
68/42...Oct. 7, Thu. Mostly Sunny, NW Wind 5-10 mph.
70/40...Oct. 8, Fri. Mostly Sunny, E Wind 5 mph
77/43...Oct. 9, Sat. Mostly Sunny, S Wind 10 mph
83/60...Oct. 10, Sun. Mostly Sunny, S Wind 15-30 mph...Record: 88-1938
85/65...Oct. 11, Mon. Partly Cloudy, SW Wind 20-40 mph......Record: 86-2010
82/64...Oct. 12, Tue. Mostly Cloudy, Few Sct'd Showers/Storms, SW Wind 20-30 mph...Record: 87-1930
58/52...Oct. 13, Wed. Mostly Cloudy with a Few Showers, Then Partly Cloudy, Northwest Winds 15-25 mph.
60/35...Oct. 14, Thu. Mostly Sunny, N Wind 5-10 mph.
66/35...Oct. 15, Fri. Mostly Sunny, SE Wind 5 mph.
74/48...Oct. 16, Sat. Partly Cloudy, SW Wind 15-25 mph.
80/60...Oct. 17, Sun. Partly Cloudy, Few Showers & Storms Late, SW Wind 20-35 mph.
51/40...Oct. 18, Mon. Mostly Cloudy, NW Wind 20-35 mph.
55/30...Oct. 19, Tue. Mostly Sunny, NW Wind 5-10 mph.
58/30...Oct. 20, Wed. Sunny, NE Wind 5-10 mph.
63/33...Oct. 21, Thu. Sunny, S Wind 5-15 mph
72/49...Oct. 22, Fri. Mostly Sunny, SW Wind 20-35 mph
62/53...Oct. 23, Sat. Mostly Cloudy, NE Wind 10-15 mph
Drier than normal trend will be with us through October & November.
Brush & field fire risk will go up in October to November.
October precipitation anomalies (yellow is below normal)................note the main tropical storm & hurricane track from the western Caribbean to the Northeast U.S. with above normal rainfall. Areas from Virginia to Maine currently how the great potential of a landfalling tropical system in October.
Late in October, a landfalling tropical system is possible in Mexico with system orginating in the Bay of Campeche. That rainfall will promote above normal rainfall anomalies in parts of Texas to New Mexico & Arizona.
Usually, rainfall really cranks up in October from western Oregon to Washington.
This year, the main corridor of heavier rainfall in October will tend to be from far northwest Washington to British Columbia.
This will extend the dryness into a normally wetter time of year in the Pacific Northwest of the U.S.
After an overall warmer & drier than normal October-November, it still appears winter will hit suddenly & pretty hard in December. I am still going for below normal temperatures & above normal precipitation with above normal snowfall in December.
This year, we have a better shot at a White Christmas.
We should then turn suddenly mild around New Year's Eve & the warmer, wetter weather should continue into early January.
Thoughts are that winter returns in late January with colder weather & snow, but the very end of December through early January may have little to no snow at all (after a snowy December).
Late January through the first entire half of February looks colder & snowier than normal, but then late February should turn nice & mild & thaw again.
March still favors above normal temperatures & precipitation with below normal snowfall.