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) |
|---|---|---|---|---|
| Richmond VA | 173 | 1.54 | -0.49 | 48.0 |
| Providence RI | 173 | 1.68 | -0.42 | 48.0 |
| Topeka KS | 173 | 1.75 | -0.51 | 48.0 |
| Indianapolis IN | 173 | 1.79 | -0.86 | 48.0 |
| Columbus OH | 173 | 1.81 | -0.95 | 48.0 |
| Hartford CT | 173 | 1.85 | -0.50 | 48.0 |
| Salem OR | 173 | 1.85 | 0.23 | 48.0 |
| Jackson MS | 173 | 1.96 | 0.39 | 48.0 |
| Boston MA | 173 | 2.02 | -0.43 | 48.0 |
| Concord NH | 173 | 2.03 | 0.02 | 48.0 |
| Columbia SC | 173 | 2.05 | -0.05 | 48.0 |
| Nashville TN | 173 | 2.05 | 0.95 | 48.0 |
| Raleigh NC | 173 | 2.09 | 0.47 | 48.0 |
| Saint Paul MN | 173 | 2.14 | 0.52 | 48.0 |
| Jefferson City MO | 173 | 2.14 | 1.22 | 48.0 |
| Honolulu HI | 173 | 2.16 | -2.06 | 48.0 |
| Sacramento CA | 173 | 2.19 | 1.51 | 48.0 |
| Frankfort KY | 173 | 2.20 | 1.54 | 48.0 |
| Annapolis MD | 173 | 2.24 | 0.60 | 48.0 |
| Charleston WV | 173 | 2.25 | 1.85 | 48.0 |
| Des Moines IA | 173 | 2.33 | 1.87 | 48.0 |
| Pierre SD | 173 | 2.34 | 1.29 | 48.0 |
| Tallahassee FL | 173 | 2.36 | -0.58 | 48.0 |
| Lansing MI | 173 | 2.37 | 1.29 | 48.0 |
| Atlanta GA | 173 | 2.42 | 0.47 | 48.0 |
| Juneau AK | 173 | 2.43 | 1.53 | 48.0 |
| Bismarck ND | 173 | 2.44 | -0.38 | 48.0 |
| Albany NY | 173 | 2.46 | 0.55 | 48.0 |
| Springfield IL | 173 | 2.58 | 1.88 | 48.0 |
| Augusta ME | 173 | 2.58 | 0.37 | 48.0 |
| Carson City NV | 173 | 2.61 | 0.20 | 48.0 |
| Dover DE | 173 | 2.62 | -0.16 | 48.0 |
| Montpelier VT | 173 | 2.64 | 1.42 | 48.0 |
| Trenton NJ | 173 | 2.71 | 2.08 | 48.0 |
| Little Rock AR | 173 | 2.72 | 0.91 | 48.0 |
| Austin TX | 173 | 2.73 | 2.17 | 48.0 |
| Madison WI | 173 | 2.80 | 1.04 | 48.0 |
| Helena MT | 173 | 2.82 | -0.58 | 48.0 |
| Montgomery AL | 173 | 2.90 | -1.82 | 48.0 |
| Olympia WA | 173 | 2.90 | -0.98 | 48.0 |
| Boise ID | 173 | 3.02 | -2.08 | 48.0 |
| Oklahoma City OK | 173 | 3.04 | -0.25 | 48.0 |
| Salt Lake City UT | 173 | 3.05 | -0.09 | 48.0 |
| Lincoln NE | 173 | 3.09 | 1.95 | 48.0 |
| Cheyenne WY | 173 | 3.13 | -0.01 | 48.0 |
| Baton Rouge LA | 173 | 3.23 | 0.58 | 48.0 |
| Phoenix AZ | 173 | 3.39 | -1.46 | 48.0 |
| Denver CO | 173 | 3.53 | 2.01 | 48.0 |
| Harrisburg PA | 173 | 3.55 | -0.78 | 48.0 |
| Santa Fe NM | 173 | 3.57 | -1.92 | 48.0 |
Each row pairs an observation with the earliest forecast we had for that hour.
| When (local) | City | Forecast | Actual | Error | Lead (h) |
|---|---|---|---|---|---|
| 2026-08-31 23:00 CDT | Montgomery AL | 80.0°F | 83.0°F | -3.0° | 48.0 |
| 2026-08-31 20:00 AKDT | Juneau AK | 52.0°F | 52.0°F | +0.0° | 48.0 |
| 2026-08-31 21:00 MST | Phoenix AZ | 87.0°F | 85.0°F | +2.0° | 48.0 |
| 2026-08-31 23:00 CDT | Little Rock AR | 84.0°F | 82.0°F | +2.0° | 48.0 |
| 2026-08-31 21:00 PDT | Sacramento CA | 65.0°F | 62.0°F | +3.0° | 48.0 |
| 2026-08-31 22:00 MDT | Denver CO | 68.0°F | 63.0°F | +5.0° | 48.0 |
| 2026-09-01 00:00 EDT | Hartford CT | 68.0°F | 69.0°F | -1.0° | 48.0 |
| 2026-09-01 00:00 EDT | Dover DE | 75.0°F | 75.0°F | +0.0° | 48.0 |
| 2026-09-01 00:00 EDT | Tallahassee FL | 77.0°F | 81.0°F | -4.0° | 48.0 |
| 2026-09-01 00:00 EDT | Atlanta GA | 78.0°F | 75.0°F | +3.0° | 48.0 |
| 2026-08-31 18:00 HST | Honolulu HI | 81.0°F | 83.0°F | -2.0° | 48.0 |
| 2026-08-31 22:00 MDT | Boise ID | 76.0°F | 75.0°F | +1.0° | 48.0 |
| 2026-08-31 23:00 CDT | Springfield IL | 83.0°F | 83.0°F | +0.0° | 48.0 |
| 2026-09-01 00:00 EDT | Indianapolis IN | 79.0°F | 80.0°F | -1.0° | 48.0 |
| 2026-08-31 23:00 CDT | Des Moines IA | 82.0°F | 83.0°F | -1.0° | 48.0 |
| 2026-08-31 23:00 CDT | Topeka KS | 85.0°F | 86.0°F | -1.0° | 48.0 |
| 2026-09-01 00:00 EDT | Frankfort KY | 78.0°F | 78.0°F | +0.0° | 48.0 |
| 2026-08-31 23:00 CDT | Baton Rouge LA | 80.0°F | 77.0°F | +3.0° | 48.0 |
| 2026-09-01 00:00 EDT | Augusta ME | 59.0°F | 57.0°F | +2.0° | 48.0 |
| 2026-09-01 00:00 EDT | Annapolis MD | 78.0°F | 78.0°F | +0.0° | 48.0 |
| 2026-09-01 00:00 EDT | Boston MA | 67.0°F | 69.0°F | -2.0° | 48.0 |
| 2026-09-01 00:00 EDT | Lansing MI | 77.0°F | 74.0°F | +3.0° | 48.0 |
| 2026-08-31 23:00 CDT | Saint Paul MN | 75.0°F | 71.0°F | +4.0° | 48.0 |
| 2026-08-31 23:00 CDT | Jackson MS | 81.0°F | 83.0°F | -2.0° | 48.0 |
| 2026-08-31 23:00 CDT | Jefferson City MO | 82.0°F | 82.0°F | +0.0° | 48.0 |
| 2026-08-31 22:00 MDT | Helena MT | 62.0°F | 62.0°F | +0.0° | 48.0 |
| 2026-08-31 23:00 CDT | Lincoln NE | 83.0°F | 79.0°F | +4.0° | 48.0 |
| 2026-08-31 21:00 PDT | Carson City NV | 69.0°F | 72.0°F | -3.0° | 48.0 |
| 2026-09-01 00:00 EDT | Concord NH | 62.0°F | 62.0°F | +0.0° | 48.0 |
| 2026-09-01 00:00 EDT | Trenton NJ | 72.0°F | 71.0°F | +1.0° | 48.0 |
| 2026-08-31 22:00 MDT | Santa Fe NM | 67.0°F | 65.0°F | +2.0° | 48.0 |
| 2026-09-01 00:00 EDT | Albany NY | 67.0°F | 69.0°F | -2.0° | 48.0 |
| 2026-09-01 00:00 EDT | Raleigh NC | 79.0°F | 80.0°F | -1.0° | 48.0 |
| 2026-08-31 23:00 CDT | Bismarck ND | 65.0°F | 64.0°F | +1.0° | 48.0 |
| 2026-09-01 00:00 EDT | Columbus OH | 78.0°F | 80.0°F | -2.0° | 48.0 |
| 2026-08-31 23:00 CDT | Oklahoma City OK | 89.0°F | 80.0°F | +9.0° | 48.0 |
| 2026-08-31 21:00 PDT | Salem OR | 68.0°F | 67.0°F | +1.0° | 48.0 |
| 2026-09-01 00:00 EDT | Harrisburg PA | 74.0°F | 75.0°F | -1.0° | 48.0 |
| 2026-09-01 00:00 EDT | Providence RI | 66.0°F | 68.0°F | -2.0° | 48.0 |
| 2026-09-01 00:00 EDT | Columbia SC | 78.0°F | 79.0°F | -1.0° | 48.0 |