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 | 178 | 1.56 | -0.36 | 48.0 |
| Austin TX | 178 | 1.64 | 0.61 | 48.0 |
| Indianapolis IN | 178 | 1.70 | 0.04 | 48.0 |
| Trenton NJ | 178 | 1.70 | -0.83 | 48.0 |
| Albany NY | 178 | 1.83 | -0.21 | 48.0 |
| Columbia SC | 178 | 1.94 | -0.70 | 48.0 |
| Charleston WV | 178 | 1.96 | 1.16 | 48.0 |
| Little Rock AR | 178 | 1.98 | 0.37 | 48.0 |
| Honolulu HI | 178 | 2.00 | -1.31 | 48.0 |
| Salem OR | 178 | 2.04 | -0.68 | 48.0 |
| Lansing MI | 178 | 2.08 | 0.27 | 48.0 |
| Annapolis MD | 178 | 2.17 | -1.19 | 48.0 |
| Providence RI | 178 | 2.17 | -1.24 | 48.0 |
| Jefferson City MO | 178 | 2.20 | 0.74 | 48.0 |
| Hartford CT | 178 | 2.25 | 0.13 | 48.0 |
| Sacramento CA | 178 | 2.30 | 0.78 | 48.0 |
| Jackson MS | 178 | 2.30 | 0.80 | 48.0 |
| Phoenix AZ | 178 | 2.33 | -1.37 | 48.0 |
| Raleigh NC | 178 | 2.33 | -1.65 | 48.0 |
| Bismarck ND | 178 | 2.37 | -0.79 | 48.0 |
| Columbus OH | 178 | 2.37 | 0.60 | 48.0 |
| Nashville TN | 178 | 2.37 | -0.49 | 48.0 |
| Saint Paul MN | 178 | 2.38 | -0.32 | 48.0 |
| Montgomery AL | 178 | 2.42 | -0.34 | 48.0 |
| Boise ID | 178 | 2.44 | -1.67 | 48.0 |
| Harrisburg PA | 178 | 2.49 | -1.45 | 48.0 |
| Augusta ME | 178 | 2.54 | 0.51 | 48.0 |
| Frankfort KY | 178 | 2.55 | -0.13 | 48.0 |
| Concord NH | 178 | 2.60 | 0.69 | 48.0 |
| Salt Lake City UT | 178 | 2.67 | -0.75 | 48.0 |
| Atlanta GA | 178 | 2.69 | 1.17 | 48.0 |
| Boston MA | 178 | 2.72 | -0.46 | 48.0 |
| Dover DE | 178 | 2.74 | -1.87 | 48.0 |
| Pierre SD | 178 | 2.78 | 1.36 | 48.0 |
| Madison WI | 178 | 2.85 | 0.74 | 48.0 |
| Des Moines IA | 178 | 2.88 | 2.14 | 48.0 |
| Cheyenne WY | 178 | 2.88 | 0.19 | 48.0 |
| Tallahassee FL | 178 | 2.90 | 0.04 | 48.0 |
| Helena MT | 178 | 2.90 | -1.09 | 48.0 |
| Oklahoma City OK | 178 | 2.90 | 0.72 | 48.0 |
| Olympia WA | 178 | 2.96 | 0.99 | 48.0 |
| Baton Rouge LA | 178 | 3.01 | 1.17 | 48.0 |
| Santa Fe NM | 178 | 3.11 | -1.56 | 48.0 |
| Springfield IL | 178 | 3.62 | 2.45 | 48.0 |
| Carson City NV | 178 | 3.68 | -0.75 | 48.0 |
| Montpelier VT | 178 | 3.68 | 1.79 | 48.0 |
| Topeka KS | 178 | 3.75 | 2.32 | 48.0 |
| Denver CO | 178 | 3.76 | 0.61 | 48.0 |
| Lincoln NE | 178 | 3.79 | 2.78 | 48.0 |
| Juneau AK | 178 | 4.78 | 2.03 | 48.0 |
Each row pairs an observation with the earliest forecast we had for that hour.
| When (local) | City | Forecast | Actual | Error | Lead (h) |
|---|---|---|---|---|---|
| 2026-09-15 04:00 CDT | Montgomery AL | 75.0°F | 75.0°F | +0.0° | 48.0 |
| 2026-09-15 01:00 AKDT | Juneau AK | 51.0°F | 41.0°F | +10.0° | 48.0 |
| 2026-09-15 02:00 MST | Phoenix AZ | 87.0°F | 84.0°F | +3.0° | 48.0 |
| 2026-09-15 04:00 CDT | Little Rock AR | 78.0°F | 77.0°F | +1.0° | 48.0 |
| 2026-09-15 02:00 PDT | Sacramento CA | 61.0°F | 63.0°F | -2.0° | 48.0 |
| 2026-09-15 03:00 MDT | Denver CO | 62.0°F | 68.0°F | -6.0° | 48.0 |
| 2026-09-15 05:00 EDT | Hartford CT | 47.0°F | 49.0°F | -2.0° | 48.0 |
| 2026-09-15 05:00 EDT | Dover DE | 58.0°F | 56.0°F | +2.0° | 48.0 |
| 2026-09-15 05:00 EDT | Tallahassee FL | 76.0°F | 74.0°F | +2.0° | 48.0 |
| 2026-09-15 05:00 EDT | Atlanta GA | 75.0°F | 71.0°F | +4.0° | 48.0 |
| 2026-09-14 23:00 HST | Honolulu HI | 77.0°F | 78.0°F | -1.0° | 48.0 |
| 2026-09-15 03:00 MDT | Boise ID | 49.0°F | 51.0°F | -2.0° | 48.0 |
| 2026-09-15 04:00 CDT | Springfield IL | 74.0°F | 71.0°F | +3.0° | 48.0 |
| 2026-09-15 05:00 EDT | Indianapolis IN | 64.0°F | 65.0°F | -1.0° | 48.0 |
| 2026-09-15 04:00 CDT | Des Moines IA | 70.0°F | 68.0°F | +2.0° | 48.0 |
| 2026-09-15 04:00 CDT | Topeka KS | 76.0°F | 82.0°F | -6.0° | 48.0 |
| 2026-09-15 05:00 EDT | Frankfort KY | 62.0°F | 63.0°F | -1.0° | 48.0 |
| 2026-09-15 04:00 CDT | Baton Rouge LA | 77.0°F | 75.0°F | +2.0° | 48.0 |
| 2026-09-15 05:00 EDT | Augusta ME | 46.0°F | 45.0°F | +1.0° | 48.0 |
| 2026-09-15 05:00 EDT | Annapolis MD | 62.0°F | 65.0°F | -3.0° | 48.0 |
| 2026-09-15 05:00 EDT | Boston MA | 54.0°F | 55.0°F | -1.0° | 48.0 |
| 2026-09-15 05:00 EDT | Lansing MI | 61.0°F | 61.0°F | +0.0° | 48.0 |
| 2026-09-15 04:00 CDT | Saint Paul MN | 61.0°F | 58.0°F | +3.0° | 48.0 |
| 2026-09-15 04:00 CDT | Jackson MS | 76.0°F | 73.0°F | +3.0° | 48.0 |
| 2026-09-15 04:00 CDT | Jefferson City MO | 77.0°F | 78.0°F | -1.0° | 48.0 |
| 2026-09-15 03:00 MDT | Helena MT | 44.0°F | 43.0°F | +1.0° | 48.0 |
| 2026-09-15 04:00 CDT | Lincoln NE | 69.0°F | 71.0°F | -2.0° | 48.0 |
| 2026-09-15 02:00 PDT | Carson City NV | 53.0°F | 52.0°F | +1.0° | 48.0 |
| 2026-09-15 05:00 EDT | Concord NH | 40.0°F | 42.0°F | -2.0° | 48.0 |
| 2026-09-15 05:00 EDT | Trenton NJ | 54.0°F | 52.0°F | +2.0° | 48.0 |
| 2026-09-15 03:00 MDT | Santa Fe NM | 61.0°F | 60.0°F | +1.0° | 48.0 |
| 2026-09-15 05:00 EDT | Albany NY | 45.0°F | 46.0°F | -1.0° | 48.0 |
| 2026-09-15 05:00 EDT | Raleigh NC | 65.0°F | 66.0°F | -1.0° | 48.0 |
| 2026-09-15 04:00 CDT | Bismarck ND | 51.0°F | 54.0°F | -3.0° | 48.0 |
| 2026-09-15 05:00 EDT | Columbus OH | 58.0°F | 59.0°F | -1.0° | 48.0 |
| 2026-09-15 04:00 CDT | Oklahoma City OK | 82.0°F | 82.0°F | +0.0° | 48.0 |
| 2026-09-15 02:00 PDT | Salem OR | 55.0°F | 52.0°F | +3.0° | 48.0 |
| 2026-09-15 05:00 EDT | Harrisburg PA | 51.0°F | 51.0°F | +0.0° | 48.0 |
| 2026-09-15 05:00 EDT | Providence RI | 54.0°F | 54.0°F | +0.0° | 48.0 |
| 2026-09-15 05:00 EDT | Columbia SC | 74.0°F | 77.0°F | -3.0° | 48.0 |