National Temperature Index

National USHCN monthly temperature updates have been discontinued. The official CONUS temperature record is now based upon nClimDiv. USHCN data for January 1895 to August 2014 will remain available for historical comparison.

Time Series


Place mouse on axis and left-click to pan; wheel up/down for zoom in/out (or shift key+left-click).

Download: xml csv json
Dates USCRN ClimDiv USHCN
189503 - 189505 -99.99°F -0.96°F -0.83°F
189603 - 189605 -99.99°F -0.95°F -0.99°F
189703 - 189705 -99.99°F -1.52°F -1.58°F
189803 - 189805 -99.99°F -1.30°F -1.43°F
189903 - 189905 -99.99°F -2.51°F -2.62°F
190003 - 190005 -99.99°F -0.36°F -0.42°F
190103 - 190105 -99.99°F -1.47°F -1.52°F
190203 - 190205 -99.99°F -0.42°F -0.33°F
190303 - 190305 -99.99°F -1.24°F -1.21°F
190403 - 190405 -99.99°F -1.44°F -1.54°F
190503 - 190505 -99.99°F -0.31°F -0.29°F
190603 - 190605 -99.99°F -2.43°F -2.43°F
190703 - 190705 -99.99°F -2.19°F -2.25°F
190803 - 190805 -99.99°F -0.06°F -0.10°F
190903 - 190905 -99.99°F -2.74°F -2.81°F
191003 - 191005 -99.99°F 2.20°F 2.20°F
191103 - 191105 -99.99°F -0.15°F -0.13°F
191203 - 191205 -99.99°F -2.95°F -2.91°F
191303 - 191305 -99.99°F -1.82°F -1.82°F
191403 - 191405 -99.99°F -0.92°F -0.89°F
191503 - 191505 -99.99°F -2.00°F -1.94°F
191603 - 191605 -99.99°F -1.32°F -1.30°F
191703 - 191705 -99.99°F -4.52°F -4.45°F
191803 - 191805 -99.99°F -0.03°F 0.00°F
191903 - 191905 -99.99°F -1.14°F -1.20°F
192003 - 192005 -99.99°F -3.10°F -3.14°F
192103 - 192105 -99.99°F 0.69°F 0.61°F
192203 - 192205 -99.99°F -1.26°F -1.26°F
192303 - 192305 -99.99°F -2.65°F -2.68°F
192403 - 192405 -99.99°F -3.44°F -3.45°F
192503 - 192505 -99.99°F 1.10°F 1.03°F
192603 - 192605 -99.99°F -1.66°F -1.70°F
192703 - 192705 -99.99°F -0.69°F -0.77°F
192803 - 192805 -99.99°F -0.99°F -1.07°F
192903 - 192905 -99.99°F -0.70°F -0.73°F
193003 - 193005 -99.99°F -0.54°F -0.61°F
193103 - 193105 -99.99°F -1.92°F -1.99°F
193203 - 193205 -99.99°F -2.07°F -2.14°F
193303 - 193305 -99.99°F -1.39°F -1.39°F
193403 - 193405 -99.99°F 1.85°F 1.74°F
193503 - 193505 -99.99°F -1.68°F -1.77°F
193603 - 193605 -99.99°F 0.48°F 0.39°F
193703 - 193705 -99.99°F -1.60°F -1.66°F
193803 - 193805 -99.99°F 0.30°F 0.25°F
193903 - 193905 -99.99°F 0.36°F 0.25°F
194003 - 194005 -99.99°F -1.03°F -1.13°F
194103 - 194105 -99.99°F -0.71°F -0.70°F
194203 - 194205 -99.99°F -0.74°F -0.76°F
194303 - 194305 -99.99°F -1.53°F -1.58°F
194403 - 194405 -99.99°F -2.06°F -2.07°F
194503 - 194505 -99.99°F -0.55°F -0.59°F
194603 - 194605 -99.99°F 1.49°F 1.42°F
194703 - 194705 -99.99°F -1.95°F -2.02°F
194803 - 194805 -99.99°F -1.13°F -1.19°F
194903 - 194905 -99.99°F -0.37°F -0.40°F
195003 - 195005 -99.99°F -2.91°F -2.94°F
195103 - 195105 -99.99°F -2.21°F -2.26°F
195203 - 195205 -99.99°F -1.92°F -1.93°F
195303 - 195305 -99.99°F -1.33°F -1.41°F
195403 - 195405 -99.99°F -1.22°F -1.31°F
195503 - 195505 -99.99°F -0.49°F -0.54°F
195603 - 195605 -99.99°F -1.26°F -1.32°F
195703 - 195705 -99.99°F -1.35°F -1.38°F
195803 - 195805 -99.99°F -1.77°F -1.78°F
195903 - 195905 -99.99°F -0.60°F -0.62°F
196003 - 196005 -99.99°F -2.62°F -2.71°F
196103 - 196105 -99.99°F -1.56°F -1.61°F
196203 - 196205 -99.99°F -1.23°F -1.29°F
196303 - 196305 -99.99°F 0.32°F 0.28°F
196403 - 196405 -99.99°F -1.38°F -1.40°F
196503 - 196505 -99.99°F -2.52°F -2.55°F
196603 - 196605 -99.99°F -0.84°F -0.90°F
196703 - 196705 -99.99°F -1.14°F -1.18°F
196803 - 196805 -99.99°F -1.12°F -1.12°F
196903 - 196905 -99.99°F -1.87°F -1.89°F
197003 - 197005 -99.99°F -2.22°F -2.23°F
197103 - 197105 -99.99°F -2.50°F -2.48°F
197203 - 197205 -99.99°F -0.10°F -0.15°F
197303 - 197305 -99.99°F -1.11°F -1.07°F
197403 - 197405 -99.99°F 0.21°F 0.21°F
197503 - 197505 -99.99°F -3.26°F -3.23°F
197603 - 197605 -99.99°F -0.83°F -0.81°F
197703 - 197705 -99.99°F 1.08°F 1.13°F
197803 - 197805 -99.99°F -1.02°F -1.06°F
197903 - 197905 -99.99°F -1.45°F -1.44°F
198003 - 198005 -99.99°F -1.53°F -1.53°F
198103 - 198105 -99.99°F 0.42°F 0.45°F
198203 - 198205 -99.99°F -1.41°F -1.39°F
198303 - 198305 -99.99°F -2.78°F -2.75°F
198403 - 198405 -99.99°F -1.97°F -1.96°F
198503 - 198505 -99.99°F 1.41°F 1.41°F
198603 - 198605 -99.99°F 1.48°F 1.49°F
198703 - 198705 -99.99°F 1.13°F 1.15°F
198803 - 198805 -99.99°F -0.08°F -0.04°F
198903 - 198905 -99.99°F 0.11°F 0.05°F
199003 - 199005 -99.99°F 0.15°F 0.13°F
199103 - 199105 -99.99°F 0.72°F 0.80°F
199203 - 199205 -99.99°F 0.91°F 0.87°F
199303 - 199305 -99.99°F -1.03°F -1.08°F
199403 - 199405 -99.99°F 0.72°F 0.71°F
199503 - 199505 -99.99°F -1.43°F -1.36°F
199603 - 199605 -99.99°F -1.68°F -1.71°F
199703 - 199705 -99.99°F -1.23°F -1.27°F
199803 - 199805 -99.99°F -0.27°F -0.25°F
199903 - 199905 -99.99°F -0.42°F -0.35°F
200003 - 200005 -99.99°F 2.03°F 2.00°F
200103 - 200105 -99.99°F 0.57°F 0.50°F
200203 - 200205 -99.99°F -1.12°F -1.21°F
200303 - 200305 -99.99°F 0.16°F 0.19°F
200403 - 200405 -99.99°F 2.11°F 2.07°F
200503 - 200505 -0.58°F -0.51°F -0.48°F
200603 - 200605 1.31°F 1.49°F 1.53°F
200703 - 200705 1.60°F 1.62°F 1.56°F
200803 - 200805 -1.39°F -1.35°F -1.32°F
200903 - 200905 -0.05°F -0.08°F -0.13°F
201003 - 201005 0.27°F 0.34°F 0.39°F
201103 - 201105 -0.38°F -0.51°F -0.48°F
201203 - 201205 4.33°F 4.29°F 4.27°F
201303 - 201305 -1.36°F -1.41°F -1.48°F
201403 - 201405 -0.45°F -0.76°F -0.77°F
201503 - 201505 1.48°F 1.24°F -99.99°F