Availability has been and is still OK at other "piish" SBC vendors like Hardkernel, Radxa/Allnet, friendlyelec, orange, banana, pine64, etc. Most of them get new stock regularly even when things sell out.
If OS options is making you skittish, pick one with good Armbian support.
If you need the extra power (even an rpi4 sounds like overkill for a weather station) you could also look at Intel embedded systems. I haven't verified but I'd wager you can find something comparable to the M2 in size and power for half the price or less.
If OS options is making you skittish, pick one with good Armbian support.
If you need the extra power (even an rpi4 sounds like overkill for a weather station) you could also look at Intel embedded systems. I haven't verified but I'd wager you can find something comparable to the M2 in size and power for half the price or less.