This shows the number of weather stations (both ham and non-ham) sending directly to APRS-IS servers. The information for packets is here.
| Year | Mon | Day | Hour | CWOP-1 | CWOP-2 | CWOP-3 | CWOP-4 | CWOP-5 | CWOP-6 | CWOP-7 | 5th | FIRST | 4th | 2nd | 6th | 7th | 8th | 3rd | other | Total |
| 2021 | 04 | 16 | 02 | 1004 | 871 | 1990 | 1939 | 3034 | 1156 | 2796 | 78 | 87 | 11 | 0 | 91 | 0 | 2 | 0 | 2162 | 15221 |
| 2021 | 04 | 16 | 01 | 987 | 918 | 2400 | 2948 | 2076 | 1120 | 2284 | 65 | 99 | 12 | 0 | 87 | 0 | 1 | 0 | 2144 | 15141 |
| 2021 | 04 | 16 | 00 | 972 | 1103 | 2617 | 2571 | 2183 | 1052 | 2570 | 90 | 91 | 15 | 0 | 77 | 0 | 2 | 0 | 2320 | 15663 |
| 2021 | 04 | 15 | 23 | 1067 | 1040 | 2330 | 2441 | 2857 | 1118 | 2202 | 71 | 78 | 13 | 0 | 104 | 0 | 2 | 0 | 2325 | 15648 |
| 2021 | 04 | 15 | 22 | 1055 | 1021 | 1949 | 3175 | 2210 | 1112 | 2529 | 74 | 100 | 12 | 0 | 84 | 0 | 2 | 0 | 2314 | 15637 |
| 2021 | 04 | 15 | 21 | 995 | 1067 | 2763 | 2283 | 2343 | 1195 | 2390 | 77 | 113 | 12 | 0 | 64 | 0 | 2 | 0 | 2314 | 15618 |
| 2021 | 04 | 15 | 20 | 1023 | 988 | 2227 | 2542 | 2542 | 1204 | 2502 | 70 | 86 | 13 | 0 | 97 | 0 | 2 | 0 | 2309 | 15605 |
| 2021 | 04 | 15 | 19 | 1006 | 1007 | 2477 | 2807 | 2661 | 1124 | 1936 | 63 | 95 | 11 | 0 | 99 | 0 | 2 | 0 | 2306 | 15594 |
| 2021 | 04 | 15 | 18 | 958 | 1085 | 1814 | 2037 | 2731 | 1044 | 3328 | 80 | 88 | 14 | 0 | 87 | 0 | 2 | 0 | 2306 | 15574 |
| 2021 | 04 | 15 | 17 | 959 | 961 | 2098 | 2953 | 2046 | 1119 | 2848 | 82 | 75 | 10 | 0 | 101 | 0 | 2 | 0 | 2295 | 15549 |
| 2021 | 04 | 15 | 16 | 978 | 1051 | 2252 | 2359 | 2074 | 1137 | 3128 | 80 | 87 | 11 | 0 | 84 | 0 | 2 | 0 | 2293 | 15536 |
| 2021 | 04 | 15 | 15 | 1041 | 1000 | 2272 | 2085 | 2105 | 1009 | 3455 | 80 | 96 | 10 | 0 | 77 | 0 | 2 | 0 | 2285 | 15517 |
| 2021 | 04 | 15 | 14 | 1007 | 1063 | 2306 | 2623 | 2343 | 1092 | 2517 | 86 | 77 | 8 | 0 | 87 | 0 | 2 | 0 | 2283 | 15494 |
| 2021 | 04 | 15 | 13 | 949 | 1043 | 2045 | 2326 | 2783 | 1088 | 2701 | 68 | 91 | 8 | 0 | 97 | 0 | 2 | 0 | 2270 | 15471 |
| 2021 | 04 | 15 | 12 | 1007 | 959 | 1974 | 2878 | 1990 | 1085 | 3017 | 74 | 91 | 10 | 0 | 90 | 0 | 2 | 0 | 2266 | 15443 |
| 2021 | 04 | 15 | 11 | 1029 | 1057 | 2004 | 2989 | 2332 | 1009 | 2475 | 82 | 97 | 11 | 0 | 78 | 0 | 2 | 0 | 2249 | 15414 |
| 2021 | 04 | 15 | 10 | 903 | 1035 | 2348 | 2649 | 1969 | 1053 | 2923 | 76 | 82 | 11 | 0 | 90 | 0 | 2 | 0 | 2250 | 15391 |
| 2021 | 04 | 15 | 09 | 951 | 1033 | 2283 | 2682 | 1622 | 1107 | 3192 | 76 | 84 | 6 | 0 | 90 | 0 | 2 | 0 | 2241 | 15369 |
| 2021 | 04 | 15 | 08 | 1027 | 977 | 2276 | 2637 | 2225 | 1140 | 2573 | 70 | 86 | 11 | 0 | 96 | 0 | 2 | 0 | 2229 | 15349 |
| 2021 | 04 | 15 | 07 | 898 | 1020 | 2117 | 2721 | 2243 | 1111 | 2727 | 75 | 103 | 10 | 0 | 76 | 0 | 2 | 0 | 2210 | 15313 |
| 2021 | 04 | 15 | 06 | 939 | 1020 | 2047 | 2502 | 2606 | 1071 | 2634 | 88 | 68 | 10 | 0 | 94 | 0 | 2 | 0 | 2205 | 15286 |
| 2021 | 04 | 15 | 05 | 951 | 1062 | 2145 | 2564 | 1971 | 1100 | 3006 | 67 | 101 | 12 | 0 | 78 | 0 | 2 | 0 | 2191 | 15250 |
| 2021 | 04 | 15 | 04 | 924 | 978 | 2338 | 2876 | 2579 | 1098 | 1978 | 77 | 85 | 12 | 0 | 90 | 0 | 2 | 0 | 2177 | 15214 |
| 2021 | 04 | 15 | 03 | 959 | 949 | 2326 | 3109 | 2293 | 1064 | 2045 | 64 | 102 | 12 | 0 | 84 | 0 | 2 | 0 | 2168 | 15177 |
| 2021 | 04 | 15 | 02 | 978 | 1046 | 2354 | 2820 | 2022 | 1042 | 2466 | 66 | 90 | 10 | 0 | 93 | 0 | 2 | 0 | 2154 | 15143 |
| 2021 | 04 | 15 | 01 | 897 | 987 | 2224 | 2819 | 2227 | 1112 | 2401 | 75 | 81 | 12 | 0 | 86 | 0 | 2 | 0 | 2140 | 15063 |
| 2021 | 04 | 15 | 00 | 945 | 1069 | 2658 | 1972 | 2734 | 1149 | 2630 | 76 | 94 | 9 | 0 | 90 | 0 | 2 | 0 | 2354 | 15782 |
| 2021 | 04 | 14 | 23 | 1028 | 1083 | 2638 | 2382 | 2125 | 1134 | 2758 | 68 | 109 | 9 | 0 | 84 | 0 | 2 | 0 | 2348 | 15768 |
| 2021 | 04 | 14 | 22 | 931 | 1099 | 2475 | 2657 | 2679 | 1040 | 2265 | 71 | 93 | 13 | 0 | 90 | 0 | 2 | 0 | 2345 | 15760 |
| 2021 | 04 | 14 | 21 | 938 | 1028 | 2019 | 2583 | 2536 | 1043 | 2981 | 75 | 83 | 13 | 0 | 101 | 0 | 2 | 0 | 2347 | 15749 |
| 2021 | 04 | 14 | 20 | 1072 | 998 | 2200 | 2746 | 2679 | 1039 | 2395 | 74 | 93 | 12 | 0 | 87 | 0 | 2 | 0 | 2344 | 15741 |
| 2021 | 04 | 14 | 19 | 1091 | 1057 | 2059 | 3040 | 1655 | 1095 | 3119 | 83 | 89 | 9 | 0 | 87 | 0 | 2 | 0 | 2337 | 15723 |
| 2021 | 04 | 14 | 18 | 1009 | 1047 | 2467 | 2978 | 2117 | 1093 | 2393 | 80 | 83 | 13 | 0 | 92 | 0 | 2 | 0 | 2336 | 15710 |
| 2021 | 04 | 14 | 17 | 964 | 1010 | 1762 | 2928 | 2548 | 1124 | 2755 | 72 | 109 | 11 | 0 | 82 | 0 | 2 | 0 | 2320 | 15687 |
| 2021 | 04 | 14 | 16 | 1044 | 1079 | 2192 | 2405 | 2158 | 1118 | 3091 | 80 | 93 | 11 | 0 | 87 | 0 | 2 | 0 | 2315 | 15675 |
| 2021 | 04 | 14 | 15 | 1026 | 1008 | 2533 | 2987 | 1971 | 1103 | 2440 | 84 | 87 | 11 | 0 | 89 | 0 | 2 | 0 | 2312 | 15653 |
| 2021 | 04 | 14 | 14 | 901 | 1065 | 2375 | 3164 | 1850 | 1115 | 2587 | 83 | 87 | 12 | 0 | 89 | 0 | 2 | 0 | 2307 | 15637 |
| 2021 | 04 | 14 | 13 | 945 | 1018 | 2106 | 2755 | 2571 | 1245 | 2397 | 73 | 85 | 10 | 0 | 100 | 0 | 2 | 0 | 2293 | 15600 |
| 2021 | 04 | 14 | 12 | 908 | 975 | 2403 | 2579 | 2381 | 1080 | 2685 | 79 | 92 | 12 | 0 | 87 | 0 | 2 | 0 | 2290 | 15573 |
| 2021 | 04 | 14 | 11 | 987 | 1001 | 1830 | 1980 | 2305 | 1145 | 3747 | 74 | 92 | 10 | 0 | 90 | 0 | 2 | 0 | 2283 | 15546 |
| 2021 | 04 | 14 | 10 | 995 | 999 | 2670 | 1947 | 2356 | 1151 | 2869 | 70 | 86 | 10 | 0 | 96 | 0 | 2 | 0 | 2274 | 15525 |
| 2021 | 04 | 14 | 09 | 983 | 1013 | 2134 | 3304 | 2065 | 1162 | 2312 | 81 | 88 | 10 | 0 | 82 | 0 | 2 | 0 | 2267 | 15503 |
| 2021 | 04 | 14 | 08 | 1066 | 1006 | 2518 | 2447 | 1937 | 1062 | 2925 | 80 | 79 | 9 | 0 | 96 | 0 | 2 | 0 | 2255 | 15482 |
| 2021 | 04 | 14 | 07 | 1028 | 1033 | 2085 | 2306 | 2122 | 1082 | 3291 | 86 | 87 | 9 | 0 | 83 | 0 | 2 | 0 | 2242 | 15456 |
| 2021 | 04 | 14 | 06 | 1015 | 1049 | 2100 | 1795 | 2575 | 1130 | 3264 | 67 | 77 | 10 | 0 | 105 | 0 | 2 | 0 | 2235 | 15424 |
| 2021 | 04 | 14 | 05 | 882 | 1079 | 2540 | 2755 | 2105 | 1109 | 2442 | 69 | 94 | 8 | 0 | 88 | 0 | 2 | 0 | 2215 | 15388 |
| 2021 | 04 | 14 | 04 | 1006 | 1105 | 2065 | 2613 | 1924 | 1033 | 3140 | 72 | 102 | 11 | 0 | 73 | 0 | 2 | 0 | 2205 | 15351 |
| 2021 | 04 | 14 | 03 | 890 | 1035 | 1710 | 2662 | 1928 | 1152 | 3485 | 64 | 92 | 11 | 0 | 97 | 0 | 2 | 0 | 2188 | 15316 |