Lower Columbia River Temperature Report for May 2018  
Generated Fri Jun 1 06:18:10 2018

  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
May 1 51.7 52.0 52.7 0/24 51.4 51.6 51.7 0/24 52.0 52.2 52.4 0/24 52.1 52.3 52.4 0/24 52.0 52.4 52.8 0/24 52.1 52.4 52.7 0/24 52.0 52.2 52.7 0/24 52.0 52.3 52.7 0/24 52.1 52.3 52.7 0/24 52.0 52.3 52.6 0/24 49.4 50.0 50.6 0/24
May 2 52.1 52.4 52.8 0/24 51.7 52.1 52.4 0/24 52.2 52.4 52.8 0/24 52.4 52.6 52.9 0/24 52.3 52.7 53.3 0/24 52.4 52.8 53.2 0/24 52.5 52.8 53.2 0/24 52.5 52.8 53.2 0/24 52.7 52.9 53.2 0/24 52.2 53.0 54.0 0/24 49.1 50.0 50.8 0/24
May 3 51.9 52.3 52.8 0/24 51.8 52.3 52.9 0/24 52.6 52.9 53.3 0/24 52.8 53.1 53.4 0/24 52.8 53.2 53.8 0/24 52.8 53.2 53.7 0/24 53.0 53.3 53.8 0/24 53.1 53.3 53.8 0/24 53.2 53.4 53.7 0/24 53.0 53.7 54.5 0/24 49.5 50.2 50.9 0/24
May 4 52.3 52.6 52.9 0/24 52.0 52.2 52.6 0/24 53.0 53.3 53.5 0/24 53.2 53.4 53.7 0/24 53.4 53.7 54.0 0/24 53.5 53.7 54.0 0/24 53.5 53.8 54.0 0/24 53.5 53.8 54.0 0/24 53.7 53.9 54.0 0/24 53.6 54.2 54.9 0/24 49.9 50.5 51.2 0/24
May 5 52.6 52.8 53.2 0/24 52.3 52.5 52.7 0/24 53.5 53.9 54.5 0/24 53.6 54.0 54.3 0/24 53.7 54.0 54.4 0/24 53.8 54.0 54.4 0/24 53.9 54.1 54.4 0/24 54.0 54.2 54.5 0/24 54.0 54.2 54.4 0/24 53.9 54.5 55.1 0/24 50.0 50.4 50.9 0/24
May 6 52.2 52.5 52.6 0/24 52.2 52.4 52.8 0/24 53.9 54.0 54.2 0/24 53.9 54.1 54.2 0/24 54.1 54.4 54.6 0/24 54.2 54.4 54.6 0/24 54.2 54.5 54.9 0/24 54.2 54.5 55.0 0/24 54.4 54.6 54.9 0/24 54.4 54.8 55.4 0/24 50.0 50.3 50.6 0/24
May 7 52.1 52.4 53.3 0/24 51.8 52.1 52.3 0/24 53.7 53.9 54.4 0/24 53.8 54.1 54.4 0/24 54.0 54.4 54.8 0/24 54.1 54.4 54.7 0/24 54.7 55.0 55.3 0/24 54.8 55.0 55.4 0/24 54.9 55.1 55.5 0/24 54.8 55.4 56.2 0/24 50.0 50.8 51.5 0/24
May 8 52.5 52.9 53.4 0/24 52.1 52.4 52.9 0/24 53.9 54.0 54.2 0/24 54.0 54.2 54.3 0/24 54.2 54.5 54.8 0/24 54.2 54.5 54.8 0/24 54.7 55.1 55.3 0/24 54.7 55.1 55.4 0/24 54.9 55.2 55.4 0/24 55.3 55.6 56.0 0/24 50.5 51.2 51.9 0/24
May 9 52.6 52.9 53.2 0/24 52.3 52.6 53.2 0/24 53.8 54.0 54.1 0/24 53.9 54.0 54.2 0/24 54.2 54.6 54.9 0/24 54.2 54.5 54.8 0/24 54.7 54.9 55.2 0/24 54.8 54.9 55.2 0/24 54.8 55.0 55.3 0/24 55.2 55.4 55.6 0/24 50.6 51.1 51.8 0/24
May 10 52.4 52.8 53.0 0/24 52.2 52.6 52.9 0/24 53.9 54.1 54.2 0/24 54.0 54.2 54.3 0/24 54.2 54.5 54.7 0/24 54.2 54.5 54.7 0/24 54.7 54.8 55.0 0/24 54.7 54.9 55.0 0/24 54.8 54.9 55.1 0/24 55.0 55.2 55.6 0/24 50.8 51.3 51.9 0/24
May 11 52.6 53.2 54.1 0/24 52.4 52.5 52.7 0/24 54.0 54.2 54.3 0/24 54.1 54.2 54.4 0/24 54.0 54.4 54.7 0/24 54.1 54.4 54.7 0/24 54.3 54.6 54.9 0/24 54.3 54.6 54.9 0/24 54.4 54.7 54.9 0/24 54.8 54.9 55.1 0/24 50.8 51.6 52.5 0/24
May 12 53.2 53.8 54.6 0/24 52.9 53.2 53.6 0/24 53.8 54.0 54.3 0/24 53.9 54.1 54.3 0/24 54.2 54.5 54.9 0/24 54.3 54.6 54.8 0/24 54.5 54.9 55.3 0/24 54.5 54.9 55.3 0/24 54.6 55.0 55.4 0/24 54.9 55.2 55.7 0/24 51.0 51.8 52.6 0/24
May 13 53.2 53.8 54.7 0/24 53.0 53.5 54.1 0/24 53.7 54.2 54.9 0/24 53.8 54.4 55.0 0/24 54.0 54.5 55.1 0/24 54.1 54.5 55.0 0/24 54.8 55.1 55.4 0/24 54.9 55.0 55.1 0/7 54.9 55.2 55.5 0/24 55.3 55.6 56.0 0/24 51.7 52.5 53.3 0/24
May 14 53.4 54.0 55.0 0/23 53.2 53.6 54.1 0/24 54.7 55.2 55.9 0/24 54.8 55.2 55.8 0/24 54.8 55.2 55.9 0/24 54.8 55.2 55.8 0/24 54.7 55.2 55.7 0/24 --- --- --- 0/0 54.8 55.2 55.8 0/24 55.3 55.7 56.0 0/24 52.3 52.9 53.4 0/24
May 15 53.9 54.4 55.5 0/24 53.8 54.4 55.1 0/24 55.2 55.5 55.8 0/24 55.2 55.5 55.8 0/24 55.5 55.8 56.2 0/24 55.6 55.8 56.2 0/24 55.5 55.9 56.5 0/24 --- --- --- 0/0 55.5 56.0 56.6 0/24 55.8 56.0 56.4 0/24 52.6 53.2 53.9 0/24
May 16 54.2 54.5 55.0 0/24 54.4 54.8 55.4 0/24 55.4 55.6 55.8 0/24 55.4 55.6 55.8 0/24 55.6 55.8 56.0 0/24 55.7 55.9 56.1 0/24 56.1 56.3 56.4 0/24 --- --- --- 0/0 56.2 56.4 56.6 0/24 56.5 56.6 56.6 0/24 53.1 53.4 53.9 0/24
May 17 54.3 54.7 55.2 0/24 54.5 54.8 55.1 0/24 55.6 55.8 56.1 0/24 55.5 55.7 55.9 0/24 55.1 55.9 56.4 0/24 55.8 56.0 56.4 0/24 55.9 56.2 56.5 0/24 --- --- --- 0/0 56.0 56.3 56.6 0/24 56.4 56.5 56.7 0/24 53.5 54.1 54.6 0/24
May 18 54.6 55.0 55.4 0/24 54.8 55.0 55.3 0/24 55.8 56.0 56.2 0/24 55.8 55.9 56.1 0/24 55.7 56.1 56.6 0/24 55.9 56.2 56.5 0/24 56.0 56.4 56.8 0/24 --- --- --- 0/0 56.1 56.5 56.9 0/24 56.5 56.7 56.9 0/24 54.1 54.5 54.8 0/24
May 19 54.9 55.3 55.7 0/24 55.1 55.3 55.6 0/24 55.9 56.2 56.5 0/24 55.9 56.1 56.4 0/24 56.0 56.3 56.8 0/24 56.1 56.4 56.8 0/24 56.3 56.5 56.8 0/24 --- --- --- 0/0 56.3 56.6 56.9 0/24 56.7 56.8 57.0 0/24 53.9 54.6 55.4 0/24
May 20 55.2 55.6 56.2 0/24 55.3 55.6 55.9 0/24 55.9 56.2 56.6 0/24 55.9 56.1 56.4 0/24 56.1 56.4 56.8 0/24 56.3 56.5 56.8 0/24 56.4 56.8 57.2 0/24 --- --- --- 0/0 56.5 56.8 57.3 0/24 56.8 57.0 57.4 0/24 54.3 54.7 55.0 0/24
May 21 55.5 55.9 56.6 0/24 55.7 56.0 56.4 0/24 56.2 56.4 56.7 0/24 56.1 56.3 56.6 0/24 56.1 56.5 57.0 0/24 56.3 56.6 57.0 0/24 56.4 56.8 57.2 0/24 --- --- --- 0/0 56.5 56.9 57.3 0/24 57.0 57.2 57.5 0/24 54.2 54.8 55.3 0/24
May 22 55.4 56.0 56.8 0/24 55.7 56.2 56.8 0/24 56.4 56.7 57.2 0/24 56.3 56.7 57.2 0/24 56.4 56.9 57.4 0/24 56.5 56.9 57.3 0/24 56.7 57.1 57.6 0/24 --- --- --- 0/0 56.8 57.2 57.7 0/24 57.1 57.5 57.9 0/24 54.4 55.1 55.8 0/24
May 23 55.9 56.5 57.5 0/24 56.1 56.5 57.1 0/24 57.1 57.4 57.7 0/24 57.1 57.4 57.7 0/24 57.0 57.5 58.2 0/24 57.1 57.5 58.2 0/24 57.1 57.5 57.9 0/24 --- --- --- 0/0 57.2 57.6 58.0 0/24 57.6 57.9 58.3 0/24 54.8 55.5 56.2 0/24
May 24 56.1 56.7 57.6 0/24 56.4 56.8 57.6 0/24 57.5 57.7 58.0 0/24 57.4 57.6 57.8 0/24 57.6 58.0 58.4 0/24 57.7 58.1 58.4 0/24 57.8 58.2 58.7 0/24 --- --- --- 0/0 57.9 58.3 58.8 0/24 58.0 58.3 58.8 0/24 55.2 55.9 56.6 0/24
May 25 56.6 57.0 57.5 0/24 56.8 57.1 57.6 0/21 57.7 57.9 58.2 0/24 57.6 57.8 58.0 0/24 57.8 58.0 58.3 0/24 57.9 58.1 58.4 0/24 58.2 58.4 58.6 0/24 --- --- --- 0/0 58.2 58.5 58.7 0/24 58.5 58.6 58.7 0/24 55.7 56.1 56.6 0/24
May 26 56.9 57.2 57.8 0/24 57.1 57.4 57.8 0/24 57.8 58.0 58.2 0/24 57.8 57.9 58.1 0/24 57.5 57.9 58.3 0/24 57.8 58.0 58.4 0/24 57.7 57.9 58.2 0/24 --- --- --- 0/0 57.7 58.0 58.4 0/24 57.9 58.2 58.4 0/24 55.5 56.2 57.0 0/24
May 27 56.7 57.3 58.1 0/24 56.9 57.4 58.0 0/24 57.9 58.1 58.5 0/24 57.8 58.1 58.4 0/24 57.7 58.2 58.7 0/24 57.9 58.3 58.7 0/24 57.8 58.3 58.8 0/24 --- --- --- 0/0 57.9 58.3 58.9 0/24 57.8 58.4 59.0 0/24 55.9 56.6 57.3 0/24
May 28 57.2 57.7 58.6 0/24 57.4 57.8 58.3 0/24 58.3 58.5 58.7 0/24 58.2 58.4 58.7 0/24 58.2 58.6 59.1 0/24 58.3 58.6 59.0 0/24 58.3 58.7 59.1 0/24 --- --- --- 0/0 58.4 58.7 59.1 0/24 58.6 58.9 59.3 0/24 56.5 57.2 58.1 0/24
May 29 57.8 58.2 58.7 0/24 57.9 58.3 58.6 0/24 58.4 58.6 58.8 0/24 58.4 58.6 58.7 0/24 58.4 58.6 58.9 0/24 58.5 58.7 59.0 0/24 58.5 58.7 58.9 0/24 --- --- --- 0/0 58.5 58.8 59.0 0/24 58.7 58.9 59.1 0/24 56.8 57.4 58.0 0/24
May 30 57.8 58.1 58.8 0/24 58.0 58.4 59.1 0/24 58.5 58.9 59.3 0/24 58.5 58.8 59.1 0/24 58.2 58.6 59.2 0/24 58.4 58.7 59.2 0/24 58.2 58.5 58.7 0/24 --- --- --- 0/0 58.2 58.5 58.7 0/24 58.5 58.8 59.1 0/24 56.2 56.9 57.5 0/24
May 31 57.3 57.7 58.0 0/24 57.5 58.0 58.7 0/24 58.8 59.0 59.1 0/24 58.7 58.9 59.0 0/24 58.5 58.8 59.1 0/24 58.7 59.0 59.2 0/24 58.4 58.7 59.1 0/24 --- --- --- 0/0 58.4 58.7 59.0 0/24 58.5 58.7 59.0 0/24 56.3 56.6 57.0 0/24
>68.05 0 0 0 0/
743		 0 0 0 0/
741		 0 0 0 0/
744		 0 0 0 0/
744		 0 0 0 0/
744		 0 0 0 0/
744		 0 0 0 0/
744		 0 0 0 0/
295		 0 0 0 0/
744		 0 0 0 0/
744		 0 0 0 0/
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 >86

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

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