This page tracks the highest and lowest temperatures ever officially recorded at 204 weather stations across Idaho, United States, based on measurements dating from 1893 to 2026. Use the interactive map or the list below to see the record high and record low temperature (in Fahrenheit) for each location, along with the date each record was set.
| Location | Temperature | Record Date |
| Aberdeen | 104 °F (40 °C) | July 28, 1934 |
| American Falls | 108 °F (42 °C) | August 8, 1990 |
| American Falls | 106 °F (41 °C) | July 13, 2002 |
| Arbon | 101 °F (38 °C) | July 13, 2002 |
| Arco | 105 °F (41 °C) | July 13, 2002 |
| Arco | 102 °F (39 °C) | July 29, 1934 |
| Arco | 101 °F (38 °C) | July 13, 2002 |
| Ashton | 101 °F (38 °C) | July 23, 2007 |
| Bancroft | 97 °F (36 °C) | July 13, 2002 |
| Bayview | 101 °F (38 °C) | August 19, 1999 |
| Bern | 101 °F (38 °C) | July 13, 2026 |
| Blackfoot | 108 °F (42 °C) | June 21, 1900 |
| Boise | 113 °F (45 °C) | July 12, 2002 |
| Boise | 96 °F (36 °C) | July 22, 2003 |
| Boise | 90 °F (32 °C) | June 28, 2015 |
| Boise | 100 °F (38 °C) | July 13, 2002 |
| Boise City | 111 °F (44 °C) | July 19, 1960 |
| Bonners Ferry | 108 °F (42 °C) | June 30, 2021 |
| Bonners Ferry | 108 °F (42 °C) | July 1, 2021 |
| Bonners Ferry | 105 °F (41 °C) | June 29, 2021 |
| Bruneau | 112 °F (44 °C) | July 12, 2002 |
| Bruneau | 102 °F (39 °C) | July 15, 2014 |
| Bruneau | 105 °F (41 °C) | July 23, 2003 |
| Buhl | 105 °F (41 °C) | July 23, 2003 |
| Burley | 107 °F (42 °C) | July 30, 2000 |
| Cambridge | 117 °F (47 °C) | July 29, 1934 |
| Carey | 106 °F (41 °C) | July 12, 2002 |
| Carey | 102 °F (39 °C) | July 17, 1998 |
| Carmen | 103 °F (39 °C) | July 12, 2002 |
| Cascade | 102 °F (39 °C) | July 13, 2002 |
| Cascade | 94 °F (34 °C) | July 27, 2000 |
| Cascade | 101 °F (38 °C) | July 11, 2002 |
| Challis | 87 °F (31 °C) | July 21, 2003 |
| Challis | 86 °F (30 °C) | July 30, 2000 |
| Clark Fork | 105 °F (41 °C) | August 4, 1961 |
| Coeur d'Alene | 109 °F (43 °C) | August 4, 1961 |
| Cottonwood | 103 °F (39 °C) | August 10, 2018 |
| Council | 107 °F (42 °C) | July 23, 2003 |
| Council | 108 °F (42 °C) | July 12, 2002 |
| Council | 103 °F (39 °C) | July 6, 2007 |
| Deary | 109 °F (43 °C) | June 30, 2021 |
| Declo | 109 °F (43 °C) | July 12, 2002 |
| Downey | 105 °F (41 °C) | July 13, 2026 |
| Driggs | 100 °F (38 °C) | July 19, 2021 |
| Dubois | 103 °F (39 °C) | July 13, 2002 |
| Elk City | 102 °F (39 °C) | July 17, 2004 |
| Elk City | 94 °F (34 °C) | July 11, 2002 |
| Elk City | 98 °F (37 °C) | August 7, 2000 |
| Elk City | 94 °F (34 °C) | July 11, 2002 |
| Elk City | 112 °F (44 °C) | August 10, 2018 |
| Elk City | 106 °F (41 °C) | July 11, 2002 |
| Elk City | 107 °F (42 °C) | August 15, 2003 |
| Elk River | 107 °F (42 °C) | August 5, 1961 |
| Ellis | 97 °F (36 °C) | July 12, 2002 |
| Emmett | 111 °F (44 °C) | July 16, 1925 |
| Fairfield | 100 °F (38 °C) | July 31, 2000 |
| Fairfield | 101 °F (38 °C) | July 14, 2002 |
| Firth | 97 °F (36 °C) | July 23, 2007 |
| Fort Hall | 104 °F (40 °C) | July 25, 1933 |
| Franklin | 91 °F (33 °C) | July 13, 2002 |
| Garden City | 106 °F (41 °C) | August 6, 1990 |
| Garden Valley | 98 °F (37 °C) | July 13, 2002 |
| Garden Valley | 110 °F (43 °C) | August 4, 1961 |
| Gibbonsville | 96 °F (36 °C) | July 11, 2002 |
| Glenns Ferry | 115 °F (46 °C) | July 24, 2003 |
| Glenns Ferry | 102 °F (39 °C) | July 12, 2002 |
| Glenns Ferry | 98 °F (37 °C) | July 17, 1998 |
| Grace | 101 °F (38 °C) | August 14, 2003 |
| Grace | 103 °F (39 °C) | July 24, 2007 |
| Grand View | 108 °F (42 °C) | July 12, 2002 |
| Grand View | 106 °F (41 °C) | July 12, 2002 |
| Hailey | 94 °F (34 °C) | July 13, 2002 |
| Hailey | 93 °F (34 °C) | July 12, 2002 |
| Hailey | 96 °F (36 °C) | July 31, 2000 |
| Hailey | 99 °F (37 °C) | July 12, 2002 |
| Hailey | 101 °F (38 °C) | June 22, 1992 |
| Hamer | 105 °F (41 °C) | August 12, 1990 |
| Hansen | 97 °F (36 °C) | July 30, 2000 |
| Harvard | 114 °F (46 °C) | August 4, 1994 |
| Homedale | 112 °F (44 °C) | July 23, 2003 |
| Hope | 91 °F (33 °C) | August 10, 2018 |
| Idaho City | 96 °F (36 °C) | July 22, 2006 |
| Idaho City | 109 °F (43 °C) | July 12, 2002 |
| Idaho Falls | 104 °F (40 °C) | July 13, 2002 |
| Idaho Falls | 103 °F (39 °C) | July 12, 2026 |
| Iona | 100 °F (38 °C) | July 13, 2002 |
| Island Park | 93 °F (34 °C) | July 23, 2003 |
| Island Park | 97 °F (36 °C) | July 29, 1996 |
| Island Park | 99 °F (37 °C) | July 23, 2007 |
| Jerome | 110 °F (43 °C) | July 24, 2003 |
| Kamiah | 111 °F (44 °C) | August 16, 2023 |
| Kellogg | 111 °F (44 °C) | August 5, 1961 |
| Ketchum | 98 °F (37 °C) | July 11, 2002 |
| Ketchum | 89 °F (32 °C) | July 13, 2002 |
| Ketchum | 96 °F (36 °C) | July 12, 2002 |
| Ketchum | 100 °F (38 °C) | July 12, 2002 |
| Kingston | 97 °F (36 °C) | August 10, 2018 |
| Kooskia | 110 °F (43 °C) | June 29, 2021 |
| Lava Hot Springs | 94 °F (34 °C) | July 13, 2002 |
| Leadore | 94 °F (34 °C) | July 22, 2003 |
| Leadore | 84 °F (29 °C) | July 12, 2002 |
| Leadore | 102 °F (39 °C) | July 27, 1982 |
| Leadore | 102 °F (39 °C) | July 12, 2002 |
| Lewiston | 115 °F (46 °C) | August 4, 1961 |
| Lowman | 94 °F (34 °C) | July 12, 2002 |
| Mackay | 100 °F (38 °C) | August 25, 2008 |
| Mackay | 92 °F (33 °C) | July 13, 2002 |
| Mackay | 104 °F (40 °C) | July 27, 1939 |
| Mackay | 92 °F (33 °C) | July 13, 2002 |
| Mackay | 95 °F (35 °C) | July 11, 2002 |
| Malad City | 105 °F (41 °C) | July 13, 2002 |
| Malad City | 103 °F (39 °C) | July 22, 2003 |
| Malad City | 98 °F (37 °C) | July 12, 2026 |
| Malta | 99 °F (37 °C) | July 3, 2001 |
| Malta | 89 °F (32 °C) | September 6, 2022 |
| McCall | 96 °F (36 °C) | July 12, 2002 |
| McCall | 103 °F (39 °C) | July 13, 2002 |
| McCall | 104 °F (40 °C) | August 10, 1928 |
| McCall | 93 °F (34 °C) | July 22, 1994 |
| McCall | 105 °F (41 °C) | July 12, 2002 |
| McCall | 98 °F (37 °C) | July 12, 2002 |
| McCammon | 103 °F (39 °C) | September 3, 1950 |
| Montpelier | 95 °F (35 °C) | July 13, 2002 |
| Montpelier | 94 °F (34 °C) | July 14, 2002 |
| Moore | 103 °F (39 °C) | July 24, 2003 |
| Moore | 105 °F (41 °C) | July 13, 2002 |
| Moscow | 109 °F (43 °C) | August 4, 1961 |
| Mountain Home | 106 °F (41 °C) | July 12, 2002 |
| Mountain Home AFB | 109 °F (43 °C) | July 19, 1960 |
| Mullan | 98 °F (37 °C) | August 10, 2018 |
| Mullan | 105 °F (41 °C) | August 10, 2018 |
| Murphy | 104 °F (40 °C) | July 23, 2003 |
| Murphy | 104 °F (40 °C) | July 12, 2002 |
| Murphy | 97 °F (36 °C) | July 12, 2002 |
| New Meadows | 104 °F (40 °C) | August 9, 1906 |
| New Meadows | 101 °F (38 °C) | July 11, 2002 |
| New Meadows | 100 °F (38 °C) | July 11, 2002 |
| New Meadows | 98 °F (37 °C) | July 12, 2002 |
| Nezperce | 106 °F (41 °C) | August 17, 2008 |
| North Fork | 113 °F (45 °C) | July 11, 2002 |
| Oakley | 111 °F (44 °C) | September 4, 1998 |
| Oakley | 108 °F (42 °C) | July 22, 1893 |
| Orofino | 92 °F (33 °C) | August 10, 2018 |
| Orofino | 105 °F (41 °C) | July 13, 2007 |
| Orofino | 93 °F (34 °C) | August 10, 2018 |
| Orofino | 95 °F (35 °C) | August 5, 2019 |
| Orofino | 102 °F (39 °C) | August 10, 2018 |
| Orofino | 112 °F (44 °C) | June 29, 2021 |
| Orofino | 97 °F (36 °C) | July 5, 2007 |
| Parma | 110 °F (43 °C) | July 13, 2002 |
| Payette | 111 °F (44 °C) | July 23, 1905 |
| Pierce | 105 °F (41 °C) | August 11, 2018 |
| Pierce | 106 °F (41 °C) | August 10, 2018 |
| Plummer | 107 °F (42 °C) | June 30, 2021 |
| Pocatello | 94 °F (34 °C) | August 25, 1988 |
| Pocatello | 104 °F (40 °C) | August 8, 1990 |
| Potlatch | 109 °F (43 °C) | June 29, 2021 |
| Potlatch | 110 °F (43 °C) | August 4, 1961 |
| Preston | 95 °F (35 °C) | August 14, 2003 |
| Preston | 110 °F (43 °C) | July 23, 2000 |
| Priest River | 108 °F (42 °C) | June 29, 2021 |
| Rexburg | 97 °F (36 °C) | August 14, 2003 |
| Rexburg | 102 °F (39 °C) | July 23, 2007 |
| Richfield | 105 °F (41 °C) | August 9, 1990 |
| Richfield | 108 °F (42 °C) | July 31, 2000 |
| Riggins | 115 °F (46 °C) | August 20, 1967 |
| Rogerson | 94 °F (34 °C) | July 23, 2003 |
| Rupert | 108 °F (42 °C) | July 12, 2002 |
| Saint Anthony | 100 °F (38 °C) | June 26, 1988 |
| Saint Anthony | 102 °F (39 °C) | August 14, 2003 |
| Saint Charles | 99 °F (37 °C) | July 28, 1931 |
| Saint Regis | 93 °F (34 °C) | August 10, 2018 |
| Salmon | 103 °F (39 °C) | July 11, 2002 |
| Salmon | 105 °F (41 °C) | July 10, 1973 |
| Sandpoint | 106 °F (41 °C) | June 30, 2021 |
| Sandpoint | 93 °F (34 °C) | August 23, 2000 |
| Shoshone | 109 °F (43 °C) | July 19, 1960 |
| Shoup | 114 °F (46 °C) | July 29, 1989 |
| Shoup | 95 °F (35 °C) | August 11, 2018 |
| Spencer | 95 °F (35 °C) | July 23, 2007 |
| St. Maries | 110 °F (43 °C) | August 11, 2018 |
| Stanley | 95 °F (35 °C) | July 31, 2000 |
| Stanley | 111 °F (44 °C) | July 12, 2002 |
| Stanley | 98 °F (37 °C) | July 14, 2002 |
| Stanley | 100 °F (38 °C) | July 13, 2002 |
| Sugar City | 104 °F (40 °C) | July 12, 1919 |
| Sun Valley | 98 °F (37 °C) | July 13, 2002 |
| Swan Falls | 115 °F (46 °C) | August 6, 1990 |
| Swan Valley | 104 °F (40 °C) | July 13, 2026 |
| Tetonia | 98 °F (37 °C) | July 15, 1955 |
| Twin Falls | 105 °F (41 °C) | July 13, 2002 |
| Twin Falls | 97 °F (36 °C) | July 21, 2006 |
| Twin Falls | 102 °F (39 °C) | July 12, 2002 |
| Victor | 100 °F (38 °C) | July 23, 2007 |
| Wallace | 106 °F (41 °C) | August 23, 1969 |
| Wallace | 102 °F (39 °C) | August 19, 2003 |
| Wallace | 91 °F (33 °C) | July 13, 2002 |
| Wallace | 93 °F (34 °C) | August 10, 2018 |
| Wallace | 104 °F (40 °C) | August 10, 2018 |
| Wallace | 102 °F (39 °C) | August 10, 2018 |
| Wayan | 94 °F (34 °C) | July 13, 2002 |
| Weiser | 95 °F (35 °C) | July 13, 2002 |
| Weiser | 109 °F (43 °C) | July 12, 2002 |
| Yellow Pine | 104 °F (40 °C) | June 29, 2015 |
The highest temperature ever officially recorded in Idaho, United States was 117 °F (47 °C), set in Cambridge on July 29, 1934.
The lowest temperature ever officially recorded in Idaho, United States was -91 °F (-68 °C), set in Saint Anthony on September 30, 1989.
This page includes record high and low temperature data for 204 weather stations in Idaho, United States.
The record highs and lows on this page span from 1893 to 2026 and are updated whenever a new station record is set.