The Year in Heat & Cold
2015
+0.90°F
ran +0.90°F warmer than the 1996–2025 average across 387 cities — the 8th warmest of 157 years on record.
Extremes
Hottest Day of 2015
118.0°F
Needles, CA · Jun 17
Coldest Day of 2015
-56.0°F
Bettles, AK · Jan 26
Records Set in 2015
Daily Heat Records Set
1,837
calendar-day record highs set in 2015 that still stand today
Daily Cold Records Set
596
calendar-day record lows set in 2015 that still stand today
Where the Year Ran Warm & Cold
Each city's 2015 average temperature versus its 1996–2025 normal — blue where the year ran cool, red where it ran hot.
Hottest & Coldest at Every City
Each city's single hottest and coldest reading of 2015 — the number is the temperature, coloured hot-to-cold. Toggle between the two.
Month by Month
National temperature anomaly by month — red above the line is a warm month, blue below is cool.
-0.28J
-4.75F
+0.74M
+1.28A
+0.99M
+1.14J
-0.17J
-0.21A
+1.79S
+1.71O
+2.33N
+5.58D
Warmest Stations & States
Warmest Stations of 2015
| 1 | Yakima WA | +4.06°F |
| 2 | Santa Maria CA | +3.74°F |
| 3 | King Salmon AK | +3.53°F |
| 4 | McCall ID | +3.46°F |
| 5 | Camarillo CA | +3.17°F |
| 6 | San Diego CA | +3.14°F |
| 7 | Long Beach CA | +3.14°F |
| 8 | Spokane WA | +3.04°F |
| 9 | Homer AK | +3.00°F |
| 10 | Redding CA | +2.91°F |
Coolest Stations of 2015
| 1 | Bangor ME | -1.59°F |
| 2 | Toledo OH | -1.52°F |
| 3 | Laredo TX | -1.34°F |
| 4 | Jonesboro AR | -1.33°F |
| 5 | Syracuse NY | -1.23°F |
| 6 | Del Rio TX | -1.18°F |
| 7 | Brownsville TX | -0.97°F |
| 8 | Annapolis MD | -0.91°F |
| 9 | Kalamazoo MI | -0.88°F |
| 10 | Corpus Christi TX | -0.88°F |
By State
Warmest states of 2015
Washington+2.57°North Dakota+2.28°Idaho+2.25°Oregon+2.15°Nevada+2.02°Montana+1.94°
Coolest states of 2015
Maine-0.69°New Hampshire-0.56°Massachusetts-0.45°Rhode Island-0.42°Texas-0.27°Connecticut-0.20°
Hottest Since · Browse all states · See where it's coldest → coldestsince.com
part of Weather Trader · supported by Substack Subscribers · data: NWS NDFD forecast + NOAA/ACIS ThreadEx records · updated 2026-07-12 22:52Z
© 2026 Weather Trader · All rights reserved
part of Weather Trader · supported by Substack Subscribers · data: NWS NDFD forecast + NOAA/ACIS ThreadEx records · updated 2026-07-12 22:52Z
© 2026 Weather Trader · All rights reserved