Lower Columbia River Temperature Report for August 2025  
Generated 2025-09-01 13:18:12

  McNary Dam forebay on Columbia R. (MCNA) McNary Dam tailwater on Columbia R. (MCPW) John Day Dam forebay (JDY) John Day Dam tailwater (JHAW) The Dalles Dam forebay on Columbia R. (TDA) The Dalles tailwater Downstream (TDDO) Bonneville Dam forebay (BON) Cascade Island (CCIW) Warrendale (WRNO) Camas / Washougal (CWMW) Pasco - Columbia Rivers (PAQW)
Date Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05 Min Avg Max >68.05
08 01 70.8 71.1 71.6 24/24 71.0 71.3 71.7 24/24 71.9 72.1 72.5 24/24 72.0 168.7 2391.3 24/24 71.7 71.9 72.2 24/24 71.8 72.0 72.2 24/24 71.2 71.3 71.6 24/24 71.2 71.4 71.6 24/24 71.1 71.4 71.7 24/24 --- --- --- 0/0 69.4 69.9 70.5 24/24
08 02 71.2 71.5 71.7 24/24 71.4 71.6 71.7 24/24 71.9 72.0 72.2 24/24 71.9 72.0 72.1 24/24 71.7 72.0 72.4 24/24 71.8 72.1 72.4 24/24 71.3 71.5 71.7 24/24 71.3 71.5 71.8 24/24 71.2 71.5 71.8 24/24 --- --- --- 0/0 69.0 69.5 69.9 24/24
08 03 71.2 71.3 71.5 24/24 71.3 71.5 71.7 24/24 71.7 71.8 72.0 24/24 71.8 72.0 72.1 24/24 71.7 71.9 72.1 24/24 71.8 71.9 72.1 24/24 71.2 71.4 71.7 24/24 71.2 71.4 71.8 24/24 71.0 71.3 71.5 24/24 --- --- --- 0/0 69.6 70.1 70.8 24/24
08 04 70.9 71.1 71.3 24/24 71.0 71.1 71.3 24/24 71.7 71.8 71.9 24/24 71.8 71.9 72.0 24/24 71.0 71.2 71.6 24/24 70.9 71.3 71.7 24/24 70.8 71.0 71.3 24/24 70.8 71.0 71.3 24/24 70.8 71.0 71.3 24/24 --- --- --- 0/0 69.3 70.0 70.6 24/24
08 05 70.4 70.6 70.9 24/24 70.6 70.8 71.0 24/24 71.4 71.6 71.7 24/24 71.7 71.8 71.8 24/24 70.6 70.9 71.1 24/24 70.8 70.9 71.0 24/24 70.5 70.7 70.9 24/24 70.5 70.7 70.9 24/24 70.5 70.7 71.0 24/24 --- --- --- 0/0 68.8 69.5 70.0 24/24
08 06 70.6 70.7 70.7 24/24 70.6 70.7 70.9 24/24 71.5 71.6 71.8 24/24 71.7 71.8 71.9 24/24 70.9 71.2 71.6 24/24 70.9 71.1 71.4 24/24 70.4 70.6 70.8 24/24 70.4 70.6 70.9 24/24 70.5 70.6 70.7 24/24 --- --- --- 0/0 69.3 69.6 69.9 24/24
08 07 70.4 70.6 70.7 24/24 70.5 70.7 70.8 24/24 71.4 71.5 71.6 24/24 71.5 71.7 71.8 24/24 71.1 71.4 71.6 24/24 71.2 71.3 71.5 24/24 70.3 70.5 70.8 24/24 70.3 70.5 70.8 24/24 70.1 70.5 70.7 24/24 --- --- --- 0/0 69.2 69.6 70.0 24/24
08 08 70.2 70.4 70.5 24/24 70.3 70.5 70.6 24/24 71.2 71.3 71.4 24/24 71.4 71.5 71.6 24/24 70.8 71.1 71.7 24/24 70.9 71.2 71.5 24/24 70.0 70.3 70.7 24/24 70.0 70.3 70.7 24/24 70.0 70.3 70.6 24/24 --- --- --- 0/0 68.7 69.2 69.5 24/24
08 09 70.4 70.7 71.0 24/24 70.6 70.8 71.0 24/24 71.1 71.2 71.3 24/24 71.3 71.3 71.4 24/24 71.0 71.4 71.9 24/24 71.0 71.4 71.8 24/24 70.4 70.7 71.2 24/24 70.4 70.7 71.2 24/24 70.4 70.7 71.0 24/24 --- --- --- 0/0 68.7 69.0 69.3 24/24
08 10 70.5 70.7 71.0 24/24 70.7 70.9 71.1 24/24 71.1 71.3 71.6 24/24 71.2 71.4 71.5 24/24 71.4 71.8 72.1 24/24 71.5 71.8 72.3 24/24 71.0 71.3 71.9 24/24 71.0 71.4 71.9 24/24 71.0 71.3 71.7 24/24 --- --- --- 0/0 68.8 69.2 69.7 24/24
08 11 70.6 70.7 71.1 24/24 70.9 71.1 71.5 24/24 71.1 71.6 72.1 24/24 71.3 71.5 71.9 24/24 71.7 72.0 72.4 24/24 71.8 72.1 72.5 24/24 71.7 72.0 72.6 24/24 71.7 72.1 72.6 24/24 71.7 72.0 72.5 24/24 --- --- --- 0/0 69.6 70.2 70.7 24/24
08 12 70.6 71.2 71.7 24/24 71.1 71.4 71.6 24/24 72.1 72.8 73.4 24/24 71.7 71.9 72.2 24/24 71.9 72.2 72.5 24/24 71.9 72.3 72.7 24/24 72.4 72.7 73.2 24/24 72.4 72.7 73.2 24/24 72.4 72.7 73.1 24/24 --- --- --- 0/0 70.6 70.9 71.3 24/24
08 13 70.8 71.6 72.1 24/24 71.1 71.5 71.7 24/24 71.0 71.7 72.5 24/24 71.3 71.5 71.8 24/24 72.1 72.4 72.7 24/24 72.2 72.3 72.5 13/13 72.6 72.8 73.2 24/24 72.6 72.9 73.2 24/24 72.8 72.9 73.1 24/24 --- --- --- 0/0 70.8 71.1 71.4 24/24
08 14 71.5 71.7 71.9 24/24 71.5 71.8 71.9 24/24 72.1 72.3 72.5 24/24 71.9 72.1 72.2 24/24 71.3 71.7 72.0 24/24 71.5 71.8 72.0 13/13 72.2 72.5 73.0 24/24 72.2 72.5 73.0 24/24 72.4 72.5 72.8 24/24 --- --- --- 0/0 70.4 70.6 70.9 24/24
08 15 71.9 72.1 72.1 24/24 71.8 72.1 72.4 24/24 72.1 72.2 72.3 24/24 72.2 72.3 72.4 24/24 71.1 71.5 71.9 24/24 71.2 71.4 71.8 24/24 72.0 72.2 72.5 24/24 72.1 72.2 72.5 24/24 72.0 72.2 72.4 23/23 --- --- --- 0/0 69.6 70.1 70.6 24/24
08 16 72.0 72.2 72.3 24/24 72.2 72.3 72.5 24/24 72.1 72.2 72.4 24/24 72.3 72.4 73.2 24/24 71.7 72.0 72.4 24/24 71.8 72.0 72.2 24/24 71.9 72.0 72.2 24/24 71.9 72.1 72.3 24/24 71.9 72.1 72.3 24/24 --- --- --- 0/0 69.4 69.8 70.1 24/24
08 17 71.7 71.8 72.0 24/24 72.0 72.1 72.2 24/24 72.2 72.3 72.6 24/24 72.3 72.4 72.6 24/24 71.9 72.1 72.4 24/24 72.0 72.2 72.3 24/24 71.5 71.7 72.0 24/24 71.6 71.8 72.0 24/24 71.7 71.8 71.9 24/24 --- --- --- 0/0 69.2 69.7 70.3 24/24
08 18 71.3 71.6 71.8 24/24 71.6 71.9 72.0 24/24 72.3 72.4 72.5 24/24 72.4 72.5 72.6 24/24 71.7 72.1 72.5 24/24 72.0 72.2 72.3 23/23 71.2 71.5 71.7 24/24 71.2 71.5 71.8 24/24 71.2 71.5 71.7 24/24 --- --- --- 0/0 69.5 70.1 70.4 24/24
08 19 71.0 71.2 71.5 24/24 71.3 71.5 71.7 24/24 72.2 72.2 72.4 24/24 72.4 72.5 72.6 24/24 71.9 72.2 72.6 24/24 72.0 72.3 72.5 24/24 71.4 71.6 72.0 24/24 71.4 71.7 72.0 24/24 71.3 71.6 71.8 24/24 --- --- --- 0/0 69.9 70.5 71.1 24/24
08 20 70.9 71.1 71.3 24/24 71.1 71.4 71.6 24/24 72.1 72.2 72.3 24/24 72.4 72.5 72.6 24/24 71.8 72.1 72.4 24/24 72.0 72.2 72.4 24/24 71.5 71.7 71.9 24/24 71.5 71.7 72.0 24/24 71.6 71.7 71.9 24/24 --- --- --- 0/0 70.1 70.5 70.8 24/24
08 21 71.1 71.4 71.7 24/24 71.5 71.7 72.0 24/24 72.1 72.2 72.5 24/24 72.4 72.5 72.7 24/24 71.6 72.0 72.3 24/24 71.9 72.1 72.4 24/24 71.4 71.7 72.0 24/24 71.5 71.7 72.0 24/24 71.4 71.7 71.9 24/24 --- --- --- 0/0 70.1 70.6 71.1 24/24
08 22 71.3 71.7 72.1 24/24 71.8 72.1 72.3 24/24 72.2 72.9 74.1 24/24 72.4 72.6 72.8 24/24 72.0 72.3 72.7 24/24 72.1 72.5 72.9 24/24 71.5 71.8 72.0 24/24 71.5 71.8 72.1 24/24 71.5 71.7 71.9 24/24 --- --- --- 0/0 70.2 70.5 70.9 24/24
08 23 71.9 72.2 72.9 24/24 72.0 72.2 72.4 24/24 72.7 73.0 73.5 24/24 72.6 72.8 73.0 24/24 72.2 72.6 72.9 24/24 72.4 72.7 73.1 24/24 71.7 72.0 72.3 24/24 71.7 72.0 72.4 24/24 71.6 71.9 72.1 24/24 --- --- --- 0/0 70.1 70.7 71.1 24/24
08 24 71.9 72.0 72.2 24/24 72.0 72.2 72.4 24/24 72.6 72.9 73.1 24/24 72.7 72.9 73.2 24/24 72.4 72.8 73.2 24/24 72.5 72.9 73.4 24/24 72.1 72.4 73.0 24/24 72.1 72.5 73.0 24/24 72.1 72.3 72.6 24/24 --- --- --- 0/0 70.5 71.0 71.5 24/24
08 25 71.8 72.0 72.2 24/24 72.2 72.3 72.5 24/24 72.8 73.0 73.2 24/24 72.8 72.9 73.0 24/24 72.7 72.9 73.2 24/24 72.9 73.1 73.2 24/24 72.8 73.0 73.1 24/24 72.9 73.0 73.2 24/24 72.6 72.9 73.1 24/24 --- --- --- 0/0 71.1 71.5 71.9 24/24
08 26 72.0 72.0 72.2 24/24 72.1 72.2 72.3 24/24 72.7 72.9 73.4 24/24 72.7 72.9 73.1 24/24 72.8 73.0 73.1 24/24 73.1 73.2 73.3 24/24 72.9 73.1 73.3 24/24 73.0 73.2 73.4 24/24 73.0 73.1 73.3 24/24 --- --- --- 0/0 70.7 71.1 71.5 24/24
08 27 72.0 72.3 72.6 24/24 72.1 72.2 72.3 24/24 72.7 73.1 73.5 24/24 72.9 73.0 73.2 24/24 72.7 72.9 73.1 24/24 72.9 73.1 73.2 24/24 73.0 73.1 73.4 24/24 73.0 73.2 73.4 24/24 72.9 73.2 73.4 24/24 --- --- --- 0/0 70.2 70.3 70.6 24/24
08 28 72.2 72.3 72.4 24/24 72.2 72.4 72.7 24/24 73.3 73.5 74.6 24/24 73.2 73.4 73.6 24/24 72.6 72.8 73.1 24/24 72.8 73.0 73.3 24/24 73.0 73.3 73.6 24/24 73.0 73.4 73.6 24/24 73.1 73.3 73.5 24/24 --- --- --- 0/0 69.8 70.5 71.1 24/24
08 29 72.1 72.3 72.8 24/24 72.4 72.6 72.7 24/24 73.2 73.4 73.6 24/24 73.2 73.4 73.5 24/24 72.9 73.4 73.9 24/24 73.0 73.4 73.9 24/24 73.2 73.3 73.5 24/24 73.2 73.4 73.6 24/24 73.1 73.3 73.5 24/24 --- --- --- 0/0 70.9 71.2 71.4 24/24
08 30 71.7 71.9 72.2 24/24 71.9 72.1 72.4 24/24 72.9 73.0 73.2 24/24 73.0 73.1 73.3 24/24 73.1 73.3 73.5 24/24 73.2 73.4 73.6 24/24 72.8 73.0 73.4 24/24 72.9 73.1 73.5 24/24 72.8 73.0 73.2 24/24 --- --- --- 0/0 71.0 71.4 71.8 24/24
08 31 71.5 71.8 72.0 24/24 71.8 72.0 72.2 24/24 72.9 73.1 73.2 24/24 73.1 73.2 73.4 24/24 72.6 72.9 73.2 24/24 72.9 73.1 73.4 24/24 72.5 72.7 72.8 24/24 72.6 72.7 72.9 24/24 72.6 72.7 72.8 24/24 --- --- --- 0/0 71.1 71.5 71.8 24/24
>68.05 31 31 31 744/
744		 31 31 31 744/
744		 31 31 31 744/
744		 31 31 31 744/
744		 31 31 31 744/
744		 31 31 31 721/
721		 31 31 31 744/
744		 31 31 31 744/
744		 31 31 31 743/
743		 0 0 0 0/
0		 31 31 31 744/
744

Temperature in Degrees Fahrenheit
<32 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 >86

Bold, red text denotes values above 68.05°F.
--- indicates No Data

NOTICE: This report is based on raw, unverified data.