Insanely high, frequent ping latency to gateway over wifi

These ping latencies are insane. It's pinging my gateway and I'm sitting two feet away from my wifi router. RSSI is -36dbM vs -100 for noise. This problem shows up with multiple routers, not just the one I pulled these numbers from. The behavior is uncorrelated with the performance metrics in the screenshot below.

64 bytes from 192.168.0.1: icmp_seq=264 ttl=64 time=2.867 ms

64 bytes from 192.168.0.1: icmp_seq=265 ttl=64 time=12.218 ms

64 bytes from 192.168.0.1: icmp_seq=266 ttl=64 time=487.110 ms

64 bytes from 192.168.0.1: icmp_seq=267 ttl=64 time=39.582 ms

64 bytes from 192.168.0.1: icmp_seq=268 ttl=64 time=307.196 ms

64 bytes from 192.168.0.1: icmp_seq=269 ttl=64 time=81.231 ms

64 bytes from 192.168.0.1: icmp_seq=271 ttl=64 time=158.692 ms

64 bytes from 192.168.0.1: icmp_seq=272 ttl=64 time=13.662 ms

64 bytes from 192.168.0.1: icmp_seq=273 ttl=64 time=2.343 ms

64 bytes from 192.168.0.1: icmp_seq=274 ttl=64 time=2.868 ms

64 bytes from 192.168.0.1: icmp_seq=275 ttl=64 time=1.827 ms

64 bytes from 192.168.0.1: icmp_seq=276 ttl=64 time=6.697 ms

64 bytes from 192.168.0.1: icmp_seq=277 ttl=64 time=237.362 ms

Request timeout for icmp_seq 278

64 bytes from 192.168.0.1: icmp_seq=278 ttl=64 time=1279.313 ms

64 bytes from 192.168.0.1: icmp_seq=279 ttl=64 time=276.583 ms

64 bytes from 192.168.0.1: icmp_seq=280 ttl=64 time=50.249 ms

64 bytes from 192.168.0.1: icmp_seq=281 ttl=64 time=8.982 ms

64 bytes from 192.168.0.1: icmp_seq=282 ttl=64 time=7.865 ms

64 bytes from 192.168.0.1: icmp_seq=283 ttl=64 time=0.908 ms

64 bytes from 192.168.0.1: icmp_seq=284 ttl=64 time=4.221 ms

64 bytes from 192.168.0.1: icmp_seq=285 ttl=64 time=0.943 ms

64 bytes from 192.168.0.1: icmp_seq=286 ttl=64 time=4.007 ms

64 bytes from 192.168.0.1: icmp_seq=287 ttl=64 time=437.437 ms

64 bytes from 192.168.0.1: icmp_seq=288 ttl=64 time=1.053 ms

64 bytes from 192.168.0.1: icmp_seq=289 ttl=64 time=471.857 ms

64 bytes from 192.168.0.1: icmp_seq=290 ttl=64 time=247.331 ms

64 bytes from 192.168.0.1: icmp_seq=291 ttl=64 time=33.710 ms