The Year in Heat & Cold
1871
-2.60°F
ran -2.60°F cooler than the 1996–2025 average across 7 cities — the 146th warmest of 157 years on record.
Extremes
Hottest Day of 1871
99.0°F
Omaha, NE · Aug 13
Coldest Day of 1871
-16.0°F
Concord, NH · Jan 23
Records Set in 1871
Daily Heat Records Set
13
calendar-day record highs set in 1871 that still stand today
Daily Cold Records Set
27
calendar-day record lows set in 1871 that still stand today
Where the Year Ran Warm & Cold
Each city's 1871 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 1871 — 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.
-2.32J
-1.44F
+1.11M
+0.60A
-0.46M
-1.16J
-2.84J
-0.87A
-6.02S
-1.18O
-7.14N
-9.94D
Warmest Stations & States
Warmest Stations of 1871
| 1 | Knoxville TN | -0.45°F |
| 2 | Madison WI | -1.38°F |
| 3 | Omaha NE | -1.50°F |
| 4 | Concord NH | -1.85°F |
| 5 | Milwaukee WI | -2.99°F |
| 6 | New York-Central Park NY | -4.39°F |
| 7 | Newark NJ | -5.62°F |
Coolest Stations of 1871
| 1 | Newark NJ | -5.62°F |
| 2 | New York-Central Park NY | -4.39°F |
| 3 | Milwaukee WI | -2.99°F |
| 4 | Concord NH | -1.85°F |
| 5 | Omaha NE | -1.50°F |
| 6 | Madison WI | -1.38°F |
| 7 | Knoxville TN | -0.45°F |
By State
Warmest states of 1871
Tennessee-0.45°Nebraska-1.50°New Hampshire-1.85°Wisconsin-2.19°New York-4.39°New Jersey-5.62°
Coolest states of 1871
New Jersey-5.62°New York-4.39°Wisconsin-2.19°New Hampshire-1.85°Nebraska-1.50°Tennessee-0.45°
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