Pacific Northwest Temperature Monitor - 15 CRN sites - December 2025 ----------------------------------------------------------------------------------------------------- TAverage(deg F) TMinimum TMaximum TRange # of Lowest Highest # of Date Clim Obs Dep Obs Dep Obs Dep Obs Dep Sites Tminimum Tmaximum Rlos Rhis ----------------------------------------------------------------------------------------------------- 20251201 30.9 29.3| -1.6 19.3| -3.0 37.5| -1.6 18.1| 1.3 15 2.1|WY 52.5|OR 0 0 20251202 30.9 34.1| 3.2 27.8| 5.5 40.5| 1.4 12.7| -4.1 15 17.2|ID 53.8|OR 0 0 20251203 30.6 31.3| 0.7 23.8| 1.8 38.1| -0.8 14.4| -2.5 15 6.6|MT 51.8|OR 0 0 20251204 30.3 33.8| 3.5 25.9| 4.2 39.5| 0.8 13.6| -3.4 15 7.5|WY 53.4|OR 0 0 20251205 30.0 38.8| 8.8 32.7| 11.2 44.3| 5.9 11.6| -5.2 15 17.2|MT 56.3|OR 0 0 20251206 29.8 39.5| 9.7 32.6| 11.2 45.9| 7.9 13.3| -3.3 15 9.7|MT 56.7|OR 0 1 20251207 29.6 40.0| 10.4 33.8| 12.4 45.6| 7.9 12.0| -4.4 15 23.0|MT 56.8|OR 0 0 20251208 29.7 43.6| 13.9 37.8| 16.3 49.3| 11.6 11.6| -4.6 15 25.9|ID 60.4|OR 0 1 20251209 30.0 45.6| 15.6 40.5| 18.7 50.9| 13.0 10.5| -5.6 15 23.5|MT 59.7|OR 0 3 20251210 30.4 48.3| 17.9 39.6| 17.4 55.3| 17.1 15.7| -0.3 15 22.8|MT 64.0|ID 0 3 20251211 30.6 44.4| 13.8 33.5| 10.9 54.5| 16.2 21.0| 5.2 15 0.5|MT 63.0|OR 0 2 20251212 30.5 39.2| 8.7 31.3| 8.7 49.7| 11.5 18.5| 2.9 15 1.0|MT 62.6|ID 0 3 20251213 30.1 38.7| 8.6 27.2| 4.9 52.0| 14.3 24.8| 9.4 15 2.3|MT 58.5|OR 0 7 20251214 29.6 40.4| 10.8 30.7| 9.0 51.7| 14.6 20.9| 5.6 15 12.2|MT 58.6|MT 0 4 20251215 29.2 44.6| 15.4 34.9| 13.7 55.4| 18.8 20.6| 5.2 15 10.6|WY 66.6|OR 0 6 20251216 29.0 46.5| 17.5 38.3| 17.5 52.3| 16.0 14.0| -1.5 15 23.5|WY 61.7|OR 0 3 20251217 29.1 39.5| 10.4 31.1| 10.2 49.4| 12.9 18.3| 2.7 15 24.1|ID 60.1|OR 0 5 20251218 29.6 37.2| 7.6 30.7| 9.2 45.9| 8.9 15.3| -0.2 15 20.1|ID 60.3|OR 0 4 20251219 30.2 38.2| 8.0 29.6| 7.5 45.5| 8.0 16.0| 0.6 15 16.3|MT 57.2|OR 0 3 20251220 30.5 32.6| 2.1 26.6| 4.2 38.9| 1.2 12.3| -3.0 15 -1.8|MT 48.6|OR 0 0 20251221 30.3 36.9| 6.6 29.6| 7.3 43.5| 5.9 13.9| -1.4 15 3.2|MT 57.9|UT 0 0 20251222 29.8 39.5| 9.7 32.8| 11.1 45.1| 8.0 12.3| -3.1 15 17.1|MT 56.3|UT 0 3 20251223 29.2 38.6| 9.4 31.9| 10.8 45.3| 8.7 13.3| -2.2 15 13.5|MT 60.6|UT 0 1 20251224 28.7 39.3| 10.6 31.2| 10.5 48.0| 11.9 16.8| 1.4 15 8.6|MT 59.5|OR 0 3 20251225 28.4 41.1| 12.7 34.1| 13.7 48.0| 12.3 13.8| -1.4 15 25.9|MT 59.4|OR 0 3 20251226 28.2 37.2| 9.0 31.7| 11.4 42.2| 6.9 10.5| -4.5 15 23.0|NV 50.5|OR 0 1 20251227 28.0 27.0| -1.0 18.2| -2.0 36.4| 1.3 18.3| 3.4 15 -13.0|MT 49.3|OR 0 0 20251228 27.8 23.4| -4.4 13.2| -6.6 31.7| -3.2 18.5| 3.4 15 -12.3|WY 48.9|OR 2 0 20251229 27.3 27.5| 0.2 19.7| 0.5 37.3| 2.7 17.6| 2.2 15 -7.4|WY 51.4|OR 0 0 20251230 26.8 29.6| 2.8 21.1| 2.7 41.2| 6.9 20.1| 4.2 15 -3.5|WY 52.7|OR 0 1 20251231 26.4 31.8| 5.4 23.1| 5.3 43.2| 9.0 20.1| 3.7 15 -1.1|WY 56.8|MT 0 1 ----------------------------------------------------------------------------------------------------- 202512 29.4 37.3| 7.9 29.5| 8.3 45.3| 8.3 15.8| 0.0 15.0 -13.0|MT 66.6|OR 2 58 Clim => 22-year climatology for 2005-2026 Obs => Daily Observation Dep => Departure from climatology TAverage => Average over all 288 5-min observations each day # of Rlos => Number of record low minimum temperatures, expected value ~ 0.8 each day # of Rhis => Number of record high maximum temperatures, expected value ~ 0.8 each day