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) |
|---|---|---|---|---|
| Nashville TN | 183 | 1.41 | 0.95 | 48.0 |
| Little Rock AR | 183 | 1.48 | 0.68 | 48.0 |
| Indianapolis IN | 183 | 1.48 | -0.78 | 48.0 |
| Raleigh NC | 183 | 1.54 | 0.17 | 48.0 |
| Columbia SC | 183 | 1.57 | -0.89 | 48.0 |
| Salem OR | 183 | 1.58 | 0.77 | 48.0 |
| Honolulu HI | 183 | 1.79 | -1.52 | 48.0 |
| Sacramento CA | 183 | 1.84 | 1.02 | 48.0 |
| Jefferson City MO | 183 | 1.85 | 1.54 | 48.0 |
| Jackson MS | 183 | 1.99 | 1.01 | 48.0 |
| Springfield IL | 183 | 2.07 | 1.85 | 48.0 |
| Des Moines IA | 183 | 2.10 | 1.01 | 48.0 |
| Frankfort KY | 183 | 2.14 | 1.30 | 48.0 |
| Columbus OH | 183 | 2.22 | -0.16 | 48.0 |
| Baton Rouge LA | 183 | 2.29 | 0.56 | 48.0 |
| Austin TX | 183 | 2.30 | 0.86 | 48.0 |
| Richmond VA | 183 | 2.36 | 1.37 | 48.0 |
| Atlanta GA | 183 | 2.43 | 0.60 | 48.0 |
| Topeka KS | 183 | 2.49 | 0.81 | 48.0 |
| Concord NH | 183 | 2.51 | -0.29 | 48.0 |
| Augusta ME | 183 | 2.53 | 0.93 | 48.0 |
| Charleston WV | 183 | 2.53 | 2.25 | 48.0 |
| Saint Paul MN | 183 | 2.55 | 0.62 | 48.0 |
| Providence RI | 183 | 2.57 | 0.05 | 48.0 |
| Albany NY | 183 | 2.58 | 1.17 | 48.0 |
| Boston MA | 183 | 2.61 | 0.94 | 48.0 |
| Hartford CT | 183 | 2.62 | 0.52 | 48.0 |
| Dover DE | 183 | 2.73 | 1.11 | 48.0 |
| Olympia WA | 183 | 2.81 | -0.61 | 48.0 |
| Bismarck ND | 183 | 2.82 | 0.19 | 48.0 |
| Montgomery AL | 183 | 2.83 | -2.42 | 48.0 |
| Juneau AK | 183 | 2.84 | 0.46 | 48.0 |
| Helena MT | 183 | 2.85 | -0.74 | 48.0 |
| Annapolis MD | 183 | 2.97 | 1.99 | 48.0 |
| Santa Fe NM | 183 | 2.97 | -0.57 | 48.0 |
| Oklahoma City OK | 183 | 2.97 | 1.73 | 48.0 |
| Carson City NV | 183 | 3.02 | -1.29 | 48.0 |
| Tallahassee FL | 183 | 3.03 | -2.16 | 48.0 |
| Montpelier VT | 183 | 3.03 | 0.77 | 48.0 |
| Lansing MI | 183 | 3.04 | 1.60 | 48.0 |
| Lincoln NE | 183 | 3.04 | 2.81 | 48.0 |
| Madison WI | 183 | 3.08 | 1.77 | 48.0 |
| Cheyenne WY | 183 | 3.22 | -0.03 | 48.0 |
| Pierre SD | 183 | 3.26 | 1.42 | 48.0 |
| Trenton NJ | 183 | 3.33 | 1.66 | 48.0 |
| Boise ID | 183 | 3.47 | 0.70 | 48.0 |
| Denver CO | 183 | 3.65 | 1.02 | 48.0 |
| Phoenix AZ | 183 | 3.72 | -2.04 | 48.0 |
| Salt Lake City UT | 183 | 3.75 | -1.58 | 48.0 |
| Harrisburg PA | 183 | 4.41 | 0.62 | 48.0 |
Each row pairs an observation with the earliest forecast we had for that hour.
| When (local) | City | Forecast | Actual | Error | Lead (h) |
|---|---|---|---|---|---|
| 2026-09-05 09:00 CDT | Montgomery AL | 82.0°F | 77.0°F | +5.0° | 48.0 |
| 2026-09-05 06:00 AKDT | Juneau AK | 44.0°F | 38.0°F | +6.0° | 48.0 |
| 2026-09-05 07:00 MST | Phoenix AZ | 84.0°F | 88.0°F | -4.0° | 48.0 |
| 2026-09-05 09:00 CDT | Little Rock AR | 86.0°F | 84.0°F | +2.0° | 48.0 |
| 2026-09-05 07:00 PDT | Sacramento CA | 56.0°F | 52.0°F | +4.0° | 48.0 |
| 2026-09-05 08:00 MDT | Denver CO | 69.0°F | 63.0°F | +6.0° | 48.0 |
| 2026-09-05 10:00 EDT | Hartford CT | 71.0°F | 72.0°F | -1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Dover DE | 75.0°F | 76.0°F | -1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Tallahassee FL | 82.0°F | 81.0°F | +1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Atlanta GA | 83.0°F | 83.0°F | +0.0° | 48.0 |
| 2026-09-05 04:00 HST | Honolulu HI | 76.0°F | 77.0°F | -1.0° | 48.0 |
| 2026-09-05 08:00 MDT | Boise ID | 54.0°F | 49.0°F | +5.0° | 48.0 |
| 2026-09-05 09:00 CDT | Springfield IL | 85.0°F | 84.0°F | +1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Indianapolis IN | 80.0°F | 78.0°F | +2.0° | 48.0 |
| 2026-09-05 09:00 CDT | Des Moines IA | 80.0°F | 81.0°F | -1.0° | 48.0 |
| 2026-09-05 09:00 CDT | Topeka KS | 83.0°F | 80.0°F | +3.0° | 48.0 |
| 2026-09-05 10:00 EDT | Frankfort KY | 84.0°F | 73.0°F | +11.0° | 48.0 |
| 2026-09-05 09:00 CDT | Baton Rouge LA | 80.0°F | 79.0°F | +1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Augusta ME | 63.0°F | 62.0°F | +1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Annapolis MD | 77.0°F | 78.0°F | -1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Boston MA | 69.0°F | 69.0°F | +0.0° | 48.0 |
| 2026-09-05 10:00 EDT | Lansing MI | 69.0°F | 69.0°F | +0.0° | 48.0 |
| 2026-09-05 09:00 CDT | Saint Paul MN | 74.0°F | 70.0°F | +4.0° | 48.0 |
| 2026-09-05 09:00 CDT | Jackson MS | 81.0°F | 80.0°F | +1.0° | 48.0 |
| 2026-09-05 09:00 CDT | Jefferson City MO | 83.0°F | 82.0°F | +1.0° | 48.0 |
| 2026-09-05 08:00 MDT | Helena MT | 52.0°F | 54.0°F | -2.0° | 48.0 |
| 2026-09-05 09:00 CDT | Lincoln NE | 81.0°F | 80.0°F | +1.0° | 48.0 |
| 2026-09-05 07:00 PDT | Carson City NV | 48.0°F | 46.0°F | +2.0° | 48.0 |
| 2026-09-05 10:00 EDT | Concord NH | 68.0°F | 69.0°F | -1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Trenton NJ | 71.0°F | 75.0°F | -4.0° | 48.0 |
| 2026-09-05 08:00 MDT | Santa Fe NM | 66.0°F | 65.0°F | +1.0° | 48.0 |
| 2026-09-05 10:00 EDT | Albany NY | 68.0°F | 70.0°F | -2.0° | 48.0 |
| 2026-09-05 10:00 EDT | Raleigh NC | 86.0°F | 84.0°F | +2.0° | 48.0 |
| 2026-09-05 09:00 CDT | Bismarck ND | 73.0°F | 75.0°F | -2.0° | 48.0 |
| 2026-09-05 10:00 EDT | Columbus OH | 77.0°F | 71.0°F | +6.0° | 48.0 |
| 2026-09-05 09:00 CDT | Oklahoma City OK | 82.0°F | 82.0°F | +0.0° | 48.0 |
| 2026-09-05 07:00 PDT | Salem OR | 54.0°F | 54.0°F | +0.0° | 48.0 |
| 2026-09-05 10:00 EDT | Harrisburg PA | 72.0°F | 75.0°F | -3.0° | 48.0 |
| 2026-09-05 10:00 EDT | Providence RI | 69.0°F | 73.0°F | -4.0° | 48.0 |
| 2026-09-05 10:00 EDT | Columbia SC | 85.0°F | 83.0°F | +2.0° | 48.0 |