Agencies
Services
Automated System Observation Facilities
The following tables list the frequencies and telephone numbers of on-site weather observation systems located at Illinois airports. The data in these tables change periodically, so check this page frequently.
Remember, a good weather briefing before your flight is your best insurance for a safe flight!
Automated Surface Observation System (ASOS) Facilities
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Current as of January 1, 2026
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Note: ASOS facilities are co-owned by Federal Aviation Administration (FAA) and the National Weather Service (NWS) and maintained by the FAA.
* - Automated Weather Sensor System.
(ATIS) – ATIS Frequency
(VHF) – VHF Discreet Frequency
(VOR) – VOR Frequency
Automated Weather Observation System (AWOS) Facilities
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Current as of January 1, 2026
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(1) – FAA Maintained AWOS
(2) – Airport Maintained AWOS
(ATIS) – ATIS Frequency
(VHF) – VHF Discrete Frequency
(VOR) – VOR Frequency