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 | 177 | 1.54 | -0.45 | 48.0 |
| Providence RI | 177 | 1.71 | -0.48 | 48.0 |
| Indianapolis IN | 177 | 1.76 | -0.84 | 48.0 |
| Topeka KS | 177 | 1.77 | -0.44 | 48.0 |
| Columbus OH | 177 | 1.82 | -0.98 | 48.0 |
| Salem OR | 177 | 1.85 | 0.27 | 48.0 |
| Hartford CT | 177 | 1.86 | -0.54 | 48.0 |
| Jackson MS | 177 | 1.93 | 0.36 | 48.0 |
| Concord NH | 177 | 2.02 | 0.06 | 48.0 |
| Boston MA | 177 | 2.03 | -0.48 | 48.0 |
| Columbia SC | 177 | 2.05 | -0.09 | 48.0 |
| Nashville TN | 177 | 2.05 | 0.98 | 48.0 |
| Raleigh NC | 177 | 2.08 | 0.42 | 48.0 |
| Jefferson City MO | 177 | 2.13 | 1.23 | 48.0 |
| Saint Paul MN | 177 | 2.15 | 0.57 | 48.0 |
| Sacramento CA | 177 | 2.16 | 1.47 | 48.0 |
| Honolulu HI | 177 | 2.19 | -2.08 | 48.0 |
| Frankfort KY | 177 | 2.19 | 1.55 | 48.0 |
| Annapolis MD | 177 | 2.21 | 0.58 | 48.0 |
| Charleston WV | 177 | 2.22 | 1.82 | 48.0 |
| Des Moines IA | 177 | 2.29 | 1.83 | 48.0 |
| Tallahassee FL | 177 | 2.36 | -0.62 | 48.0 |
| Pierre SD | 177 | 2.38 | 1.37 | 48.0 |
| Juneau AK | 177 | 2.39 | 1.51 | 48.0 |
| Lansing MI | 177 | 2.40 | 1.35 | 48.0 |
| Bismarck ND | 177 | 2.40 | -0.36 | 48.0 |
| Atlanta GA | 177 | 2.42 | 0.53 | 48.0 |
| Albany NY | 177 | 2.49 | 0.46 | 48.0 |
| Springfield IL | 177 | 2.56 | 1.89 | 48.0 |
| Augusta ME | 177 | 2.57 | 0.41 | 48.0 |
| Dover DE | 177 | 2.58 | -0.17 | 48.0 |
| Carson City NV | 177 | 2.60 | 0.14 | 48.0 |
| Montpelier VT | 177 | 2.62 | 1.42 | 48.0 |
| Trenton NJ | 177 | 2.65 | 2.03 | 48.0 |
| Little Rock AR | 177 | 2.67 | 0.91 | 48.0 |
| Austin TX | 177 | 2.68 | 2.12 | 48.0 |
| Helena MT | 177 | 2.79 | -0.57 | 48.0 |
| Madison WI | 177 | 2.79 | 1.07 | 48.0 |
| Montgomery AL | 177 | 2.86 | -1.81 | 48.0 |
| Olympia WA | 177 | 2.90 | -0.90 | 48.0 |
| Boise ID | 177 | 2.98 | -2.03 | 48.0 |
| Salt Lake City UT | 177 | 3.00 | -0.06 | 48.0 |
| Lincoln NE | 177 | 3.12 | 2.01 | 48.0 |
| Oklahoma City OK | 177 | 3.16 | -0.06 | 48.0 |
| Cheyenne WY | 177 | 3.16 | -0.11 | 48.0 |
| Baton Rouge LA | 177 | 3.21 | 0.63 | 48.0 |
| Phoenix AZ | 177 | 3.33 | -1.42 | 48.0 |
| Harrisburg PA | 177 | 3.49 | -0.77 | 48.0 |
| Santa Fe NM | 177 | 3.53 | -1.84 | 48.0 |
| Denver CO | 177 | 3.54 | 2.05 | 48.0 |
Each row pairs an observation with the earliest forecast we had for that hour.
| When (local) | City | Forecast | Actual | Error | Lead (h) |
|---|---|---|---|---|---|
| 2026-09-01 03:00 CDT | Montgomery AL | 77.0°F | 77.0°F | +0.0° | 48.0 |
| 2026-09-01 00:00 AKDT | Juneau AK | 51.0°F | 50.0°F | +1.0° | 48.0 |
| 2026-09-01 01:00 MST | Phoenix AZ | 82.0°F | 83.0°F | -1.0° | 48.0 |
| 2026-09-01 03:00 CDT | Little Rock AR | 79.0°F | 79.0°F | +0.0° | 48.0 |
| 2026-09-01 01:00 PDT | Sacramento CA | 59.0°F | 59.0°F | +0.0° | 48.0 |
| 2026-09-01 02:00 MDT | Denver CO | 65.0°F | 62.0°F | +3.0° | 48.0 |
| 2026-09-01 04:00 EDT | Hartford CT | 66.0°F | 69.0°F | -3.0° | 48.0 |
| 2026-09-01 04:00 EDT | Dover DE | 74.0°F | 74.0°F | +0.0° | 48.0 |
| 2026-09-01 04:00 EDT | Tallahassee FL | 75.0°F | 77.0°F | -2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Atlanta GA | 74.0°F | 72.0°F | +2.0° | 48.0 |
| 2026-08-31 22:00 HST | Honolulu HI | 77.0°F | 80.0°F | -3.0° | 48.0 |
| 2026-09-01 02:00 MDT | Boise ID | 70.0°F | 70.0°F | +0.0° | 48.0 |
| 2026-09-01 03:00 CDT | Springfield IL | 80.0°F | 78.0°F | +2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Indianapolis IN | 76.0°F | 77.0°F | -1.0° | 48.0 |
| 2026-09-01 03:00 CDT | Des Moines IA | 78.0°F | 78.0°F | +0.0° | 48.0 |
| 2026-09-01 03:00 CDT | Topeka KS | 81.0°F | 78.0°F | +3.0° | 48.0 |
| 2026-09-01 04:00 EDT | Frankfort KY | 75.0°F | 74.0°F | +1.0° | 48.0 |
| 2026-09-01 03:00 CDT | Baton Rouge LA | 78.0°F | 76.0°F | +2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Augusta ME | 55.0°F | 53.0°F | +2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Annapolis MD | 76.0°F | 77.0°F | -1.0° | 48.0 |
| 2026-09-01 04:00 EDT | Boston MA | 65.0°F | 68.0°F | -3.0° | 48.0 |
| 2026-09-01 04:00 EDT | Lansing MI | 75.0°F | 72.0°F | +3.0° | 48.0 |
| 2026-09-01 03:00 CDT | Saint Paul MN | 69.0°F | 66.0°F | +3.0° | 48.0 |
| 2026-09-01 03:00 CDT | Jackson MS | 77.0°F | 77.0°F | +0.0° | 48.0 |
| 2026-09-01 03:00 CDT | Jefferson City MO | 78.0°F | 78.0°F | +0.0° | 48.0 |
| 2026-09-01 02:00 MDT | Helena MT | 56.0°F | 55.0°F | +1.0° | 48.0 |
| 2026-09-01 03:00 CDT | Lincoln NE | 79.0°F | 73.0°F | +6.0° | 48.0 |
| 2026-09-01 01:00 PDT | Carson City NV | 60.0°F | 66.0°F | -6.0° | 48.0 |
| 2026-09-01 04:00 EDT | Concord NH | 60.0°F | 58.0°F | +2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Trenton NJ | 70.0°F | 71.0°F | -1.0° | 48.0 |
| 2026-09-01 02:00 MDT | Santa Fe NM | 63.0°F | 61.0°F | +2.0° | 48.0 |
| 2026-09-01 04:00 EDT | Albany NY | 65.0°F | 69.0°F | -4.0° | 48.0 |
| 2026-09-01 04:00 EDT | Raleigh NC | 77.0°F | 78.0°F | -1.0° | 48.0 |
| 2026-09-01 03:00 CDT | Bismarck ND | 57.0°F | 56.0°F | +1.0° | 48.0 |
| 2026-09-01 04:00 EDT | Columbus OH | 74.0°F | 76.0°F | -2.0° | 48.0 |
| 2026-09-01 03:00 CDT | Oklahoma City OK | 82.0°F | 74.0°F | +8.0° | 48.0 |
| 2026-09-01 01:00 PDT | Salem OR | 61.0°F | 58.0°F | +3.0° | 48.0 |
| 2026-09-01 04:00 EDT | Harrisburg PA | 72.0°F | 73.0°F | -1.0° | 48.0 |
| 2026-09-01 04:00 EDT | Providence RI | 64.0°F | 68.0°F | -4.0° | 48.0 |
| 2026-09-01 04:00 EDT | Columbia SC | 74.0°F | 76.0°F | -2.0° | 48.0 |