For now*

77F for the low at ORD- 20250 is the 6 hr low and 403280250 is the high and low for the 24 hr period ending at 1am - both in "C" METAR KORD 040551Z 00000KT 10SM FEW150 26/22 A2993 RMK AO2 SLP131 T02560222 10289 20250 403280250 55001 and also seen here- DSM all time Sept rec warm low is 80F on 9/5/1899. Warmest low in this stretch here has been 76F.

Congrats to the PNW for all the greens and blues.

Looks like we got up to 67F with some clouds.

79 at ORD right now. That temp is gonna have to hold for another hour though to break the all-time record high minimum for September, which seems doubtful.