Tracking Xweather forecasts vs actuals for 50 US state capitals
Mean absolute error (°F) using the earliest stored forecast for each hour vs the observed temperature. Lower is better. Ranked best → worst.
| Capital | Samples | MAE °F | Bias °F | Avg lead (h) |
|---|---|---|---|---|
| Indianapolis IN | 174 | 1.30 | -0.66 | 48.0 |
| Little Rock AR | 174 | 1.37 | 0.86 | 48.0 |
| Sacramento CA | 174 | 1.60 | 0.40 | 48.0 |
| Jefferson City MO | 174 | 1.62 | 1.01 | 48.0 |
| Nashville TN | 174 | 1.66 | 1.10 | 48.0 |
| Honolulu HI | 174 | 1.73 | -1.33 | 48.0 |
| Des Moines IA | 174 | 1.75 | 0.51 | 48.0 |
| Raleigh NC | 174 | 1.75 | 0.60 | 48.0 |
| Salem OR | 174 | 1.87 | 1.05 | 48.0 |
| Austin TX | 174 | 2.04 | -0.22 | 48.0 |
| Columbus OH | 174 | 2.07 | 0.38 | 48.0 |
| Columbia SC | 174 | 2.14 | 0.24 | 48.0 |
| Jackson MS | 174 | 2.28 | 1.38 | 48.0 |
| Albany NY | 174 | 2.29 | 0.53 | 48.0 |
| Baton Rouge LA | 174 | 2.32 | 1.08 | 48.0 |
| Springfield IL | 174 | 2.33 | 2.14 | 48.0 |
| Augusta ME | 174 | 2.33 | 0.36 | 48.0 |
| Boston MA | 174 | 2.37 | 0.92 | 48.0 |
| Topeka KS | 174 | 2.47 | 1.49 | 48.0 |
| Frankfort KY | 174 | 2.48 | 1.77 | 48.0 |
| Saint Paul MN | 174 | 2.53 | 0.55 | 48.0 |
| Concord NH | 174 | 2.53 | -1.01 | 48.0 |
| Charleston WV | 174 | 2.56 | 2.29 | 48.0 |
| Dover DE | 174 | 2.60 | 0.56 | 48.0 |
| Cheyenne WY | 174 | 2.63 | -1.01 | 48.0 |
| Atlanta GA | 174 | 2.64 | 1.40 | 48.0 |
| Lansing MI | 174 | 2.71 | 1.66 | 48.0 |
| Hartford CT | 174 | 2.75 | 0.13 | 48.0 |
| Providence RI | 174 | 2.75 | -0.44 | 48.0 |
| Madison WI | 174 | 2.78 | 2.14 | 48.0 |
| Annapolis MD | 174 | 2.82 | 1.45 | 48.0 |
| Richmond VA | 174 | 2.87 | 1.52 | 48.0 |
| Oklahoma City OK | 174 | 2.89 | 1.94 | 48.0 |
| Trenton NJ | 174 | 2.90 | 0.44 | 48.0 |
| Tallahassee FL | 174 | 2.94 | -2.03 | 48.0 |
| Montpelier VT | 174 | 3.00 | 0.57 | 48.0 |
| Lincoln NE | 174 | 3.03 | 2.59 | 48.0 |
| Harrisburg PA | 174 | 3.05 | 0.95 | 48.0 |
| Olympia WA | 174 | 3.11 | -0.27 | 48.0 |
| Carson City NV | 174 | 3.12 | -2.26 | 48.0 |
| Juneau AK | 174 | 3.13 | 0.13 | 48.0 |
| Helena MT | 174 | 3.17 | -0.83 | 48.0 |
| Bismarck ND | 174 | 3.30 | 1.21 | 48.0 |
| Denver CO | 174 | 3.32 | -0.04 | 48.0 |
| Santa Fe NM | 174 | 3.36 | -1.16 | 48.0 |
| Montgomery AL | 174 | 3.48 | -0.36 | 48.0 |
| Boise ID | 174 | 3.66 | 1.06 | 48.0 |
| Phoenix AZ | 174 | 3.75 | -2.05 | 48.0 |
| Pierre SD | 174 | 3.90 | 1.72 | 48.0 |
| Salt Lake City UT | 174 | 4.28 | -3.59 | 48.0 |
Each row pairs an observation with the earliest forecast we had for that hour.
| When (local) | City | Forecast | Actual | Error | Lead (h) |
|---|---|---|---|---|---|
| 2026-09-07 00:00 CDT | Montgomery AL | 79.0°F | 75.0°F | +4.0° | 48.0 |
| 2026-09-06 21:00 AKDT | Juneau AK | 55.0°F | 56.0°F | -1.0° | 48.0 |
| 2026-09-06 22:00 MST | Phoenix AZ | 93.0°F | 95.0°F | -2.0° | 48.0 |
| 2026-09-07 00:00 CDT | Little Rock AR | 84.0°F | 82.0°F | +2.0° | 48.0 |
| 2026-09-06 22:00 PDT | Sacramento CA | 65.0°F | 66.0°F | -1.0° | 48.0 |
| 2026-09-06 23:00 MDT | Denver CO | 75.0°F | 71.0°F | +4.0° | 48.0 |
| 2026-09-07 01:00 EDT | Hartford CT | 57.0°F | 56.0°F | +1.0° | 48.0 |
| 2026-09-07 01:00 EDT | Dover DE | 64.0°F | 70.0°F | -6.0° | 48.0 |
| 2026-09-07 01:00 EDT | Tallahassee FL | 78.0°F | 73.0°F | +5.0° | 48.0 |
| 2026-09-07 01:00 EDT | Atlanta GA | 78.0°F | 76.0°F | +2.0° | 48.0 |
| 2026-09-06 19:00 HST | Honolulu HI | 80.0°F | 82.0°F | -2.0° | 48.0 |
| 2026-09-06 23:00 MDT | Boise ID | 64.0°F | 57.0°F | +7.0° | 48.0 |
| 2026-09-07 00:00 CDT | Springfield IL | 73.0°F | 67.0°F | +6.0° | 48.0 |
| 2026-09-07 01:00 EDT | Indianapolis IN | 67.0°F | 69.0°F | -2.0° | 48.0 |
| 2026-09-07 00:00 CDT | Des Moines IA | 75.0°F | 70.0°F | +5.0° | 48.0 |
| 2026-09-07 00:00 CDT | Topeka KS | 81.0°F | 75.0°F | +6.0° | 48.0 |
| 2026-09-07 01:00 EDT | Frankfort KY | 66.0°F | 64.0°F | +2.0° | 48.0 |
| 2026-09-07 00:00 CDT | Baton Rouge LA | 80.0°F | 82.0°F | -2.0° | 48.0 |
| 2026-09-07 01:00 EDT | Augusta ME | 55.0°F | 55.0°F | +0.0° | 48.0 |
| 2026-09-07 01:00 EDT | Annapolis MD | 68.0°F | 69.0°F | -1.0° | 48.0 |
| 2026-09-07 01:00 EDT | Boston MA | 58.0°F | 61.0°F | -3.0° | 48.0 |
| 2026-09-07 01:00 EDT | Lansing MI | 62.0°F | 59.0°F | +3.0° | 48.0 |
| 2026-09-07 00:00 CDT | Saint Paul MN | 72.0°F | 72.0°F | +0.0° | 48.0 |
| 2026-09-07 00:00 CDT | Jackson MS | 80.0°F | 78.0°F | +2.0° | 48.0 |
| 2026-09-07 00:00 CDT | Jefferson City MO | 78.0°F | 78.0°F | +0.0° | 48.0 |
| 2026-09-06 23:00 MDT | Helena MT | 63.0°F | 60.0°F | +3.0° | 48.0 |
| 2026-09-07 00:00 CDT | Lincoln NE | 80.0°F | 72.0°F | +8.0° | 48.0 |
| 2026-09-06 22:00 PDT | Carson City NV | 58.0°F | 61.0°F | -3.0° | 48.0 |
| 2026-09-07 01:00 EDT | Concord NH | 55.0°F | 50.0°F | +5.0° | 48.0 |
| 2026-09-07 01:00 EDT | Trenton NJ | 60.0°F | 64.0°F | -4.0° | 48.0 |
| 2026-09-06 23:00 MDT | Santa Fe NM | 70.0°F | 76.0°F | -6.0° | 48.0 |
| 2026-09-07 01:00 EDT | Albany NY | 54.0°F | 54.0°F | +0.0° | 48.0 |
| 2026-09-07 01:00 EDT | Raleigh NC | 71.0°F | 70.0°F | +1.0° | 48.0 |
| 2026-09-07 00:00 CDT | Bismarck ND | 72.0°F | 72.0°F | +0.0° | 48.0 |
| 2026-09-07 01:00 EDT | Columbus OH | 66.0°F | 67.0°F | -1.0° | 48.0 |
| 2026-09-07 00:00 CDT | Oklahoma City OK | 87.0°F | 83.0°F | +4.0° | 48.0 |
| 2026-09-06 22:00 PDT | Salem OR | 61.0°F | 58.0°F | +3.0° | 48.0 |
| 2026-09-07 01:00 EDT | Harrisburg PA | 62.0°F | 62.0°F | +0.0° | 48.0 |
| 2026-09-07 01:00 EDT | Providence RI | 55.0°F | 57.0°F | -2.0° | 48.0 |
| 2026-09-07 01:00 EDT | Columbia SC | 75.0°F | 74.0°F | +1.0° | 48.0 |