1978

-2.23°F

ran -2.23°F cooler than the 1996–2025 average across 370 cities — the 136th warmest of 157 years on record.

Extremes

119.0°F

Lake Havasu City, AZ · Jul 20

-52.0°F

Bettles, AK · Dec 16

639

calendar-day record highs set in 1978 that still stand today

1,054

calendar-day record lows set in 1978 that still stand today

Each city's 1978 average temperature versus its 1996–2025 normal — blue where the year ran cool, red where it ran hot.

Each city's single hottest and coldest reading of 1978 — the number is the temperature, coloured hot-to-cold. Toggle between the two.

National temperature anomaly by month — red above the line is a warm month, blue below is cool.

-5.70J

-7.77F

-2.83M

-0.83A

-1.24M

-1.08J

-1.28J

-0.86A

-0.37S

-1.23O

-0.72N

-3.07D

Warmest states of 1978

Alaska+0.98°Puerto Rico+0.13°Hawaii-0.24°California-0.97°Guam-1.09°Utah-1.13°

Coolest states of 1978

Vermont-4.58°South Dakota-4.04°Nebraska-3.99°Montana-3.73°New Hampshire-3.73°Delaware-3.71°

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
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