1 Rain season (all year): 1 January - 31 December; Rain season (Monsoon): 15 June - 30 September (fixed by NWS - no longer relies on 3-day high DP duration).
5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).
6 Air Quality Index (AQI) data as provided by Arizona Department of Environmental Quality - data not available ~0000-0600 MST.
9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station's recorded maximum or a percentage of computed theoretical solar maximum using the station's location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.
10 Historical average only to day 16 of just the month of January for this station since 4/2006.
11 Historical average rain this season to day 16 of January for this station since 4/2006.
NWS Weather Forecast -
Outlook M.L. King Jr. Day & Tonight
M.L. King Jr. Day
NWS forecast: Mostly sunny, with a high near 60. Northwest wind around 3 mph.
NWS forecast: Partly cloudy, with a low around 45. North wind around 5 mph.